Eternal Motion

Chapter 6 of book Lambda of Aristotle’s Metaphysics takes chapter 5’s unification of eternal and corruptible sensible substance as a starting point, and now inquires into the relation between sensible, movable substance as a whole and unmoved substance. We’ve been following the detailed development of Gwenaëlle Aubry’s provocative non-traditional interpretation of the distinctive features of Aristotle’s account.

“The simple and necessary substance is not needed in order to give an account of the substances that, insofar as they are mixed from act and in-potentiality, can either be or not be, but in order to give an account of movement insofar as it cannot not be. The first question for Aristotle is not ‘why is there being?’ but ‘why is there movement?’, or, more precisely, ‘why is there always movement?'” (Aubry, Dieu san la puissance, 2nd ed., ch. 5, p. 178, emphasis added, my translation throughout).

“Whereas the theology of omnipotence is a response to the question of the emergence of being, the theology of pure act in effect is a response to the question of the eternity of movement. The god of Aristotle thus provides a reason for the most manifest, for the most evident. It is not the ground — or the bottomlessness — of the mystery of being, more mysterious than the being it serves to explain, but the reason of the most immediate, most apparent phenomenon. Movement, in effect, is the first given” (ibid).

“[A]mong the different species of movement, the priority comes back to local movement. The latter is indeed anterior to genesis: ‘It is impossible that generation should be first’. Generation is only first in the order of the individual, since the latter must exist in order to move. But in order for it to come into being, it is necessary for another being to have preexisted it which was in movement, and the same for this last. Thus it is not movement that comes to be, but coming to be that presupposes an antecedent movement and being” (pp. 178-179, emphasis in original).

She quotes from Generation and Corruption book II chapter 10, “For it is far more reasonable that what is should cause the coming-to-be of what is not, than that what is not should cause the being of what is. Now that which is being moved is, but that which is coming-to-be is not: hence motion is prior to coming-to-be” (Collected Works, Barnes ed., vol. 1, p. 550, emphasis in original).

“There is no first instant of movement. Movement cannot not have always been” (Aubry, p. 179). She notes that the Metaphysics does not contain the demonstration of this. Aristotle’s actual demonstration of the eternity of movement occurs in book VIII of the Physics, and basically consists in adding an indefinite regress to arguments like those we have just seen.

“Lambda 6 in effect establishes that the principle of such a movement must be not power but act. We have already seen Aristotle’s insistence here on underlining, as in book capital Alpha, the originality of such a thought of the principle. The argument works in a regressive way, establishing successively that the principle of eternal movement cannot be conceived as a power (dunamis), not even as an active or acting power, but must be such that its very substance is act, he ousia energeia. Its stages, let us recall, are the following:”

“–to give an account of movement, it is not sufficient to assert a moving or efficient (kinetikon e poietikon) capacity, if it does not act (me energoun); for it is possible to have a power without acting (endekhetai gar to dunamin ekhon me energein)”

“–nonetheless, even supposing that the principle acts (ei energesei), we cannot give an account of eternal movement if its ousia is dunamis. In effect, if that which has a power has the possibility of not acting, that which is in-potentiality has the possibility of not being (endekhetai gar to dunamei on me einai)”

“–it follows therefore that there is a principle such that its ousia is act, he ousia energeia” (p. 180).

She notes the striking parallelism of Aristotle’s phrases, but also finds a progression between the two formulae, corresponding to a transition between the “kinetic” and “ontological” senses of dynamis that she has often remarked upon.

“As with that from power to in-potentiality, the transition is thus effectuated from action to act: the principle of eternal movement must be conceived not only as an always active and acting power, but as an act. The argument relies only on the ontological sense of [pure] energeia, understood as that mode of being which is subtracted from the possibility of non-being” (p. 181).

“Ultimately we find posed as the condition of eternal movement, a being of which the ousia is energeia. But to say this is also to say, as the two moments of the demonstration underline, that from this substance is excluded every form of power: as much active power as in-potentiality. Thus — and it is again necessary to underline the force, and the paradox, of such a thesis: the very condition of the efficacity of the principle resides in its absence of power. It is not because it is all-powerful or fully active, but indeed because it is fully act that it is maximally efficacious, since it is the principle of eternal movement” (ibid, emphasis in original).

“That the principle (or principles) of eternal movement are act is deduced again from two necessary properties: eternity and immateriality. We verify equally the claim of Lambda 5: act serves to name not only (as Theta 8 established) the mode of being of the necessary and the eternal, but also that of form or the immaterial” (p. 183).

She goes on to contrast this argument with the more limited concerns of Aristotle’s demonstration of the need for an unmoved mover in the Physics.

“Decisive for the demonstration of Lambda 6, the ontological sense is on the other hand absent from that of Physics VIII. The latter utilizes not the schema of finality and the correlation of in-potentiality and act, but that of efficiency and of the correlation of powers…. [T]he text of Physics VIII considers at length the Platonic hypothesis according to which the first principle can be a self-mover. It is concerned to demonstrate that even a self-mover must have a mover and a moved, and finally to establish that at the origin of change there must be an unmoved mover. But the relation of the unmoved mover to that which it moves is thought on the model of efficiency…. The hypothesis, foundational for Lambda 6, of an unactualized power, or a power that is able to not act, is not envisaged. The action of the mover on the moved is described [in Physics VIII] as that of a mechanical force, working by contact with the first moved thing” (ibid).

In Physics VIII, Aristotle even speaks of a temporally infinite power (dynamis apeiros) behind what is commonly translated as “eternal” movement. In Aubry’ s paraphrase, “But an infinite power cannot reside in a finite body, so the first mover must be thought as being indivisible, without parts, and without magnitude” (p. 184).

Physics VIII is after all concerned with the roots of ordinary physical motion, so it is reasonable that it focuses on the “kinetic” sense of dynamis. It does seem that Metaphysics Lambda refers to Physics VIII’s demonstration of the need for an unmoved mover, so it is reasonable to assume that Lambda represents a later development.

It should not be surprising that Lambda, from a different and later point of view, makes new arguments about the first cause that are not in Physics VIII, and corrects some statements of the latter on its nature. Aubry does not comment on this discrepancy, but is content to do her due diligence in pointing it out. We saw earlier, however, that in Physics III Aristotle does also subordinate the kinetic sense of dynamis to what she calls the ontological one of in-potentiality.

Next in this series: Ousia Energeia

Book Theta: Summing Up

We’ve reached the end of Gwenaëlle Aubry’s chapter on book Theta of Aristotle’s Metaphysics. At this point, with the textual analysis complete, she pauses to reflect on what this all means. I for one have been extremely impressed with the quality of her argument, upon this rather close examination in which we have been embarked. Here her conclusions seem to follow with ease. I’ll keep my comments to a minimum here, and mostly let her speak for herself.

“The movement of book Theta, such as we have attempted to trace, appears to us… as having for its object to subtract dunamis from the logic of force” (Dieu san la puissance, 2nd ed., ch. 4, pp. 145-146, my translation throughout).

“Theta 8 also justifies the etymology of the very terms, of Aristotelian invention, energeia and entelekheia, in posing the identity between act, ergon (function or work), and end…. Act says something more than ousia: not only subsistence, but being-in-the-end…. Thenceforth, dunamis and energeia are not only opposed as that which can be to that which is fully, or as the potential to the actual. They are articulated as oriented movement — tendency — toward its end” (p. 146).

“Act, for this reason, no longer appears only as another name for the composed ousia, but for ousia as such, and power, univocally characterized as the power of contraries, is designated as the principle of a fundamental contingency” (ibid).

“The notion of act is charged with an axiological significance [one having to do with value], the same that it already had in the Protrepicus where it made its appearance. If the identity of act and good is not explicitly posed in Theta (as it will be on the other hand in book Lambda), it is nonetheless presupposed by the identification between act, end, and ergon” (ibid).

“If the birthplace of the notion of energeia is ethics, and if this notion thereafter passes to ontology, it is indeed for founding an axiological ontology which in its content pronounces the identity of being, the end, and in the same way the good” (ibid).

“Going forward, what is proper to the ontology of dunamis and energeia seems to us to reside in that it allows being to be thought otherwise than as power and otherwise than as presence. Being, in the way that dunamis and energeia express it, is not only that which is there, not only that which acts [agit]” (p. 147).

(In the front matter to her second volume, Aubry says clearly, “Act is not action. Act does not act [L’acte n’agit pas].”)

“Dunamis, we have said, is reducible neither to active power nor to passive power, but must be thought as the possibility of a movement toward act. As for act, it expresses not only presence, but being-in-the end and the good as realized or (when it excludes in-potentiality) as real: substance having realized its essence as good, or essentially good substance. Act thus appears as the ontological name of the good. It expresses the unity of being and value, the conjunction of the ideal and the real. Every act is a perfection, however ephemeral it may be — a place of absoluteness, an inalienable achievement. That is in act which, however weak it may be, was successful — that in which an Idea is here and now, even for a brief instant, incarnated. The Aristotelian good, we recall, is not an abstract universal, a Form without substantiality, or an empty ideal: it is, for each being, a possibility that is proper to it, and that can be effectuated. An axiological ontology, the ontology of act appears also as an ontology of non-scission” (ibid).

She notes that Pierre Aubenque, with whom she studied, wrote about both scission (a cut) and mediation in Aristotle in this context, but tended to emphasize the scission. She also sees both as important, but prefers to emphasize the mediation.

“In a sense, our reading only modifies this accentuation. But at the same time, far from seeing in the thought of Aristotle a metaphysics of inachievement and a wisdom of limits, we see an ontology of perfection, which also carries with it an ethics of surpassing: what is important is not that being is not immediately perfect, the human not necessarily divine, but that by way of the notion of in-potentiality, they are posed as capable of being so, by way of the notion of act as having being, even fugitively” (p. 147n).

“Aristotle nonetheless thinks the difference of being and the good at the same time as their identity. It is in-potentiality that serves to name this difference, this division. If it does not have being absolutely, neither is being in-potentiality an absolute non-being. It is at the same time in the mode of not yet and of always already: being in-potentiality is to be awaiting what we will be. But it is also, since in-potentiality is for a determinate act and becoming, to carry its becoming and its end in itself: being in-potentiality is being able to become what one is. If in-potentiality expresses the division between a being and what it has to be (its act, indeed, in which reside also its end and its good), it also expresses the possibility of annulling that division. In-potentiality at the same time poses distance and its crossing: if it expresses difference, it is as a provisionally differentiated identity. Indeed no more than the good is an empty ideal (or a Form-Idea) is in-potentiality an indefinite desire doomed to unfulfillment” (p. 147).

“In this way, Aristotle avoids the misfortune of scission. But he nonetheless does not fall into the naivete of immediacy. With dunamis is introduced the mediation of time, of movement, and even, with dunamis meta logou in the human, of liberty” (p. 148).

Here she gives the Greek for what is traditionally translated as rational power. More literally, this is “power after logos“, which more clearly captures the dependency of such power on the logos associated with deliberation.

“This division introduces the possibility of encounter, of error, of accident. An ontology of non-scission, the ontology of in-potentiality and in-act also leaves a place for the thought of failure or messing things up. If act poses the good and the end as real, and in-potentiality as to be realized, the passage from in-potentiality to act is never assured. The potential cannot be called a future actual, and the actualization of in-potentiality is never necessary, since it can be suspended by deliberated choice, or interrupted by accident” (ibid).

“Finally, the distance between act and in-potentiality leaves a place not only for difference, but for alterity [otherness]” (ibid).

She goes on to give some conclusions about causality.

“[E]fficiency is not suppressed…, but subsumed under finality: alterity is required as a moment of this progress toward self” (ibid).

“Efficiency nonetheless is only a means for finality, and transitive causality is only a means for immanent development. For the articulation of dunamis and energeia has something else remarkable in that it allows the efficacy of the end and the good to be thought. We have seen that in-potentiality is not thought in the order of force. It is nonetheless the source of a movement, or of a change, which has for principle the form as end, or act. For the end does not act, at least in the sense that it is not an efficient cause…; if it is, it is only metaphorically, kata metaphoran. The end indeed is efficacious without being efficient. If it acts, or has an effect, it is not as an efficient cause, in implementing an active power, it is a cause as act and end of in-potentiality. We could say, going forward, that if act names the mode of being of the good and the end, in-potentiality names its mode of action” (pp. 148-149, emphasis in original).

“The correlation of in-potentiality and act also allows the specificity of final causality as causality that is effective but not efficient to be thought” (p. 149).

This, she recalls, was one of the projects laid out in book Alpha, where Aristotle insisted on his originality with respect to the causes.

“For to identify this causality implies precisely to think the good neither as power and efficient cause, in the manner of Love or Intellect [as Empedocles and Anaxagoras respectively held], nor as in-potentiality, in the manner of the separate Forms. Plato in the Republic attributed dunamis to the Good: but if we want to think the power of the good, it is necessary to think it not as dunamis, but as energeia, and as the end of in-potentiality” (ibid).

“It is indeed in the articulation of dunamis to energeia that the secret of the power of the Good resides, that ‘daimonic force that makes it so that things are disposed in view of the better and the more perfect’, and to which Socrates in the Phaido relates his quest” (ibid).

“Going forward we understand that book Alpha of the Metaphysics, which we can read in part as an echo of this text from the Phaido, encompasses Socrates and Anaxagoras in the same critique: to succeed where they both failed, it is necessary to understand that the power of the good is daimonic or divine precisely in that it is not a power” (ibid).

Here of course she uses “power” in two different senses.

Then, as I have also emphasized, hypothetical necessity is central to Aristotle’s notion of explanation. Here we have Aristotle’s answer to questions about freedom and determinism.

“Hypothetical necessity governs both the facts of nature and those of choice. It is indeed as compatible with contingency as it is with the frequency or modality of natural phenomena such that their regularity can be interrupted by accident” (p. 150). She cites book II of the Physics.

“[Hypothetical necessity] nonetheless does not hold good as a simple heuristic concept, or a simple ‘as if’, but indeed as a constitutive principle, since in-potentiality inscribes in the very heart of beings, natural as well as artificial, the efficacity of the end and the reality of act” (p. 151).

Next I’ll take a look at her chapter on book Lambda.

Next in this series: Book Lambda: Introduction

Act in Process

At this point we are starting to sum up the results of Aristotle’s Metaphysics book Theta on potentiality and act. Aubry now makes a stronger statement that what it is in itself to be something in potentiality or in act can only be made clear by considering the relation between the two.

“In fact, and always in continuity with the analogy of Theta 6 [between various particular cases of something being in-potentiality and in-act], we begin by considering the relation of dunamis and energeia — that which, according to Theta 6, is the unique means of understanding these notions in themselves, but which also serves to justify the various equivalences posed by the analogy” (Aubry, Dieu san la puissance, 2nd ed., ch. 4, p. 135, my translation throughout, Becker number citations to the Greek text omitted).

“This relation is defined according to a triple anteriority: energeia is anterior to dunamis at once according to the formula, logoi; according to the substance, ousiai; and, but only from one point of view, according to time” (ibid).

“Of an individual in-act, one must say in effect that she is engendered from in-potentiality by another individual in act…. In-potentiality is no longer presented here as a principle of movement, but as a transitory state between two acts. And energeia in its turn is no longer identified with movement, but with the state of that which moves [something else], insofar as it is identical in form with the moved” (p. 136, emphasis in original).

This case applies to biological reproduction.

“Anteriority according to the formula is qualified as evident: it is in relation to act that one defines in-potentiality” (ibid).

“From [Becker index] 1050a4 on, we go on to explore the third relation of anteriority, that according to ousia [“substance”; what it was to have been a thing]. Here we are at the heart of Theta 8, and indeed of Theta in its entirety, since here the triple transition will be accomplished — from the kinetic sense to the ontological sense; from the model of the transitivity and the correlation of powers to the model of the dunamis–energeia correlation insofar as it applies to transitive change as well as to immanent change; and finally, from the model of efficiency to the teleological model.”

“The anteriority according to ousia is not initially given as an anteriority in the order of existence, but as an anteriority in that of form and of essence…. That which is anterior according to ousia is posterior according to generation: the adult is posterior to the infant…, even though in the latter is found the form that is not fully present. But this inversion from one order to the other is explained by the fact that the anteriority of act according to ousia is that of form as end: the act [the adult] is ‘that for the sake of which’ for generation.”

“Here we rejoin the analyses of books Zeta and Eta, where the substitution of the notion of act for that of form proceeds from the adoption of an etiological, and not only logical, point of view, by which the form is considered in its causal function, and envisaged as end” (ibid).

In a composite of form and matter, the form that is considered as end and not only “logically” will be in a sense identified with the composite as a whole, i.e., with the form as realized in matter.

“The anteriority of act according to ousia is that of the end, that is to say of the form as the term of a process that realized it in a matter — and indeed, in the composite that book Zeta qualifies as ousia malista [ousia most of all].”

“For it is this anteriority of act as end that provides the key to the necessary correlation of dunamis and energeia. One does not say only that energeia is to dunamis as that which builds is to the art of building, or as that which sees is to that which is given to view, but that it is for building that one understands architecture; for sight that one has sight; for contemplating that one has the power of contemplating. Act, from this point on, does not appear only as that in relation to which one defines power, but as that for which power is” (p. 137, emphasis in original).

She quotes Aristotle, “The act is the end, and it is in view of it that the power is acquired” (p. 137).

“We integrate here the results of Theta 7 for justifying the equivalence between matter and in-potentiality; for what justifies this equivalence is that the matter is teleologically determined by the form…. As at the end of book Eta, act serves here to name the unity realized from the matter and the form” (ibid).

Act serves “as another name for the ousia malista [ousia most of all] of book Zeta” (p. 138). And this is none other than the composite of form and matter.

“The ontological sense of energeia nonetheless is presented as being at the foundation of the kinetic sense; if movement can be called energeia, it is insofar as we take it as an index of being…. From now on, what justifies the equivalence between energeia and kinesis is that movement can also be telos. And if energeia and kinesis can be called entelekheia, it is not only in the sense where they name effective and complete being in opposition to the incomplete being that in-potentiality says, but because they name that being which, for in-potentiality, is its end” (ibid).

She quotes Aristotle, “For the ergon [completed work] is the end, and energeia is ergon. This is why the term energeia is derived from that of ergon, and tends toward entelekheia” (p. 139).

She continues, “Ergon thus intervenes as the mediation between energeia and telos, and indeed also between energeia and entelekheia. It was present, we saw, from the first lines of Theta 1, presented alongside dunamis and energeia as a sense of being. We find it also, in a sense at the same time normative and teleological, in the Protrepicus. The term serves here to allow the kinetic sense and the ontological sense of energeia to be unified, and at the same time to range the first under the second.”

“If it can play this role, it is thanks to the double sense that it carries: in fact, ergon signifies at the same time the proper function, understood as the act in which the essence is accomplished, and the oeuvre [completed work]. For the remainder of the text goes on precisely to distinguish between two kinds of act: one intransitive, in which nothing else is accomplished but itself, and the other transitive, which produces a being exterior to itself. To illustrate the first, one gives the example of vision, which is the ergon-function of sight, and serves in itself as a telos, an end; for the second, the example of the construction which, resulting in an ergon-work, the house, is only fully [an end] when taken together with the latter. From this we understand that movement can be called energeia: because it indeed has an ergon and a telos, which are not confused with it, but are its work, or that which it produces, and in which, thenceforward, we can say that it is.”

“In fact, ‘the action of building a house resides in the house that is built, and it comes to be and is at the same time as the house’. This affirmation can appear problematic at first glance: one tends spontaneously to distinguish the transitive activity from what it produces, and the being of the house from that of the movement of its construction, since the house only fully is when, precisely, the movement is no longer. We can nonetheless understand this in the light of the analysis of movement in Physics III, and of its characterization as the act common to the mover and the moved: Aristotle already affirmed that the ergon and the telos of the agent and the patient, or of the mover and the moved, reside in one sole and same energeia. In the same way, it seems that the phrase of Theta 8 has no sense unless by the house we understand not the completed house, but the house as object of the movement of construction. We thus understand that the act of construction comes to be at the same time as the house in the process of being constructed, since the two movements (construction/being constructed) are one. The work and the end of transitive activity do not reside in the achieved product, but in the production itself…. The distinction between immanent activity and transitive activity is no longer so great” (pp. 139-140, emphasis in original).

A being that is “in process” can also be an “achieved” being, in varying degrees insofar it also represents an incremental achievement.

“We have seen in effect that act was identical to form as the end and term of in-potentiality, indeed to the form as realized in a matter. If act is anterior to power from the point of view of ousia, this anteriority is not only the logical one of the form-essence and the ousia prote, but also that of substance and ousia malista” (pp. 140-141).

Here we see Aristotle’s strong vindication of immanence and concrete being. Ends — and indeed “perfection” according to a particular kind — are intended to be understood as realizable in form and matter. This is far indeed from the perspective that all finite things necessarily fall infinitely short of a perfection conceived as infinite. For Aristotle, the highest being will be characterized not as infinite, but as pure act and as the good.

Next in this series: Act as Separable

Interim Recap

We are still slowly walking through Gwenaëlle Aubry’s groundbreaking fresh reading of Aristotle’s Metaphysics in the second edition of her Dieu sans la puissance (2020). She highlights neglected aspects of the rich meaning of Aristotle’s key terms dynamis and energeia, which I learned in the Latin-based English of potentiality and actuality.

On the one hand, these are central to Aristotle’s account of motion. Aristotle identifies dynamis as the immanent source or principle of motion in natural things. He calls motion itself an incomplete energeia, and the entelechy of a dynamis. But in so doing, he also gives these terms a modal sense that he indicates is more primary than the sense having to do with motion.

That is to say, the Physics already effectively identifies in-act and in-potentiality as modalities of saying something “is” something. To be something in-act is to fully — immanently and concretely, as expressed in actions and interactive behavior — be that thing.

The Physics and other works on nature also already subordinate motion and sources of motion to causality by ends. Aristotle’s general approach to explanation leaves room for mechanical explanation (relativized to the level of hypothetical necessity), but avoids determinism, by subordinating mechanical explanation to explanation in terms of the realization of ends, which may occur in more than one way. For example, an animal is generally determined by a need for food, but the specific ways it will seek or find it on a given day are largely governed by “accidental” conjunctions of circumstances. Hypothetical necessity allows for a kind of play or maneuvering room in the working out of results.

Most recently, we saw that dynamis for Aristotle is always relative to something. Being something in potentiality derives its meaning from what it is to be that something in act. This reflects the priority of actuality that Aristotle always insists upon. If in the register of doing we call dynamis a power, this must be understood in a narrow sense as the power to do something definite. In the case of a “rational” power (one associated with a being capable of deliberation), it is understood as the ability to optionally do or not do some definite thing. More fundamentally, every particular potentiality is a potentiality to be some definite thing, or to exercise some definite way of being.

Since the same being may have many such powers or capabilities, potentiality as a modality is effectively multiple. We never have just one potentiality, but rather a field of potentiality consisting of multiple alternative real possibilities and capabilities.

The relativity of dynamis says that there is never a blank slate, or a completely undetermined situation. Things are not rigidly predetermined, but nothing ever just happens in a completely arbitrary way either. Looking backward, there is always an immanent explanation and a reason why things turned out the way they did.

Next in this series: Act in Process

The Relativity of Dynamis

“Up to the end of Theta 5, even though the end of Theta 3 had initiated the ontological inquiry, it is principally the kinetic dunamis [potentiality] that we have explored. The first lines of Theta 6 close this first moment: now that we have treated dunamis in relation to movement, it is necessary, writes Aristotle, to take an interest in energeia [act]. We note anew the dyssymmetry already raised: it is the study of energeia, not of dunamis, that presides over the extension of energeia as of dunamis from the kinetic sense to the ontological sense.”

“Energeia and dunamis will be initially characterized as two distinct sides of one thing of huparkhein, of existing. They are thus designated as two distinct modes of being, where the difference, nonetheless, can be known only through their opposition. This opposition constructs in-potentiality as relative to energeia [act as “in-a-work-ness”, or something realized in a work] — thereby rejoining the definition of dunaton in Theta 3 as that of which the act can exist (huparkhe he energeia). Thus, the in-potentiality is to be understood as that of [the statue of] Hermes in the wood, or that of the half-line in the whole line, because the one and the other can be separated…, or again as the way in which someone knows something without contemplating it, if it can be contemplated. If in-potentiality thus finds itself characterized only relatively to energeia, the latter in its turn is not explicitly defined, but implicitly identified with what is separated in the first example (the Hermes and the half-line), and with the exercise in the second (contemplation)” (Aubry, Dieu san la puissance, 2nd ed., ch. 4, p. 130, my translation throughout).

“Theta 8 will show, in conformity with what Theta 3 already affirmed, that it is the ontological sense [of dynamis and energeia] that is primary: it thus appears that movement can be called energeia insofar as it is taken as the manifestation of being, or again of the work, or again of the end. It is indeed the kinetic sense that will appear as an extension of the ontological sense, and of a more determinate sense by virtue of which act is not only another name for being, but for being in the end” (p. 132).

Aubry points out that the last lines of Theta 6, which somewhat confusingly emphasize a distinction between whether an end is immanent or not, have been regarded by leading scholars (including Werner Jaeger and Miles Burnyeat) as an addition to the text.

She notes that in Theta 8, “we will read that movement can be considered as a form of energeia insofar as, in certain cases, it can serve as an end…. Far from being opposed to energeia as that which does not have its end in itself to that in which the end is immanent, kinesis will be presented as a form of energeia insofar as it can serve as an end, which leads us to suspect the last lines of Theta 6″ (p. 133).

“As was already the case in Theta 5, we are here formulating restrictive conditions, which rule out saying that any matter whatsoever is in-potentiality for any form whatsoever. In-potentiality is only said of a determinate matter in relation to a determinate form. More precisely, in-potentiality indicates the very possibility of the relation of such a matter to such a form. Even in formulating the conditions of the equivalence dunamis–hyle posed by the analogy, Theta 7 thus justifies the formula of Eta according to which ‘the proximate matter and the form are one and the same thing, the one in-potentiality and the other in act’.”

“If in-potentiality names the capacity of matter to acquire a determinate form, the division of dunamis from hyle is no less maintained, at the same time as it is given measure. In effect, for the products of tekhne [art] as well as for the phuseis [natures], we can establish a common criterion: the uniqueness of change. Potential is thus distinguished from the indeterminate possibility in virtue of which any matter whatsoever could [supposedly] acquire any form whatsoever. But it is also distinguished from the actual….”

“If Theta 7 prolongs the analyses of Theta 5, a change of perspective is also evident: in effect, the question posed is no longer to know only of what a thing is capable, dunaton, but for what it is in-potentiality, dunamei…. A double displacement is marked here: first, the distinction between active power and passive power, with which we began, is effaced before the notion of in-potentiality…. [And second,] the notion of in-potentiality thus serves to name, beyond the distinction between active power and passive power, the very possibility of the interaction of an agent and a patient with a view to a determinate change.”

“In what follows, we will ask not only when a thing is in-potentiality for another, but when a thing is in-potentiality in another: in so doing, we ask not only about in-potentiality as a principle of change, but about in-potentiality as a mode of being” (p. 134, emphasis in original).

“This transition will be completed in chapter 8….”

“The text [of chapter 8] opens with a redefinition of dunamis…: this new definition, which is more expansive, is in effect formulated in such a way as to include natural beings…. In the same way, natural beings are defined in Physics II as ‘having in themselves a principle of motion and rest’. Nature can thus be said to belong to the same genus as dunamis, since it is an immanent principle of movement. Thus redefined, dunamis will be envisaged in the order of immanence more than in that of transitivity: we thus integrate the results of the previous chapter, which defined in-potentiality at the conjunction of the active and the passive, and beyond this distinction. The extensive definition of dunamis thus marks the definitive adoption of a new point of view, in virtue of which potentiality [puissance] will no longer be considered in the order of the correlation of agent and patient, but in its relation to act. Dunamis will thus appear as the principle of a movement that can take place within something, which is essentially teleological [finalisé] (even if it can have no other end than itself), and which is a transition from a certain non-being to full reality” (p. 135, emphasis in original).

Next in this series: Interim Recap

Rational and Natural Powers

“Theta 2 prolongs the analysis of dunamis in proposing another distinction, which no longer opposes active power to passive power, but power that is rational or accompanied by a logos, to irrational power. This analysis marks progress in comparison with Theta 1, in that it considers at the same time the relation of power to its effect. In so doing it gives a maximal extension to the notion, in manifesting that it applies as much to animate as to inanimate beings, and as much in the field of nature as in that of techne” (Aubry, Dieu san la puissance, 2nd ed., ch. 4, p. 121, my translation throughout).

“What distinguishes rational power is that it can be power for two contrary effects, ton enantion, where irrational power is only for one sole contrary: thus, the medical art can produce sickness or health, while fire can only heat. The logos in effect ‘shows at the same time a thing and its privation’…. Privation, which we have seen cannot in any case characterize a power, but rather characterizes its contrary, impotence, is given as the object of the logos that governs it. This object is nonetheless derived, or ‘in a certain way accidental’: it is in initially considering the positive contrary, or the form, then in negating it by reasoning that we see the negative contrary. The primacy of the positive contrary is thus maintained” (ibid).

The medical art and fire are very different kinds of things. They are both called “powers”, but the one is “rational” and the other natural or “irrational”. The medical art seems analogous to the art of housebuilding that serves as the canonical example of an Aristotelian principle of motion or “efficient cause”. Fire for Aristotle is one of four material elements defined by a division in terms of primitive qualities. In a recent post, we briefly saw how even the cyclical transformations of these qualitative elements can fit into an ultimately teleological schema, without any extravagant hypotheses.

We saw in the last post that Aubry’s strong emphasis on the distinctively Aristotelian dative form dynamei as characteristic of being in potentiality does not by any means rule out a recognition that Aristotle in fact devotes more space to the more common nominative form dynamis, which can after all be reasonably translated as “power”, which has wider non-Aristotelian usage, and which plays an important role in Plato.

Aristotle specifies the applicable meaning of logos in this context as the rational deliberation that governs prohairesis or choice, and thereby also governs the exercise of power or capability.

In the case of natural powers like that of fire to heat things, for Aristotle it is always a matter of power to do, cause, or undergo something definite. Then independently, as a matter of general logic (and of even more fundamental ethical seriousness about consistency of our assertions), we must affirm that a power we have stipulated to be for something definite is just that. If we accept that a particular “power” is for something definite, then we must also accept that is not a power for the opposite of that definite something, nor indeed for anything other than what it is for.

It is thoughtful deliberation that involves a consideration of pro and con, and determines a choice about the exercise of a power that in itself just is what it is. In the rational case too, the power at issue is still a power to do something definite, just like a natural power. But here the governing deliberation — in order to be a genuine deliberation at all — must be fundamentally open, and not predetermined in its outcome. This is how rational animals have freedom. We have flexibility and plasticity in the exercise of definite powers.

So we see that outside of first philosophy, Aristotle does use a more conventional notion of power. But Plato, Aristotle, and the classical Greeks generally regarded the idea of unlimited power — and indeed anything unlimited — with a kind of horror. (It seems to have been Philo of Alexandria who introduced the very un-Greek notion of infinite power.) Aristotle treats both rational and natural powers always as powers for something definite. It is reason, and more specifically deliberation about alternatives — not power in itself — that allows us freedom.

“This analysis allows two requirements that are apparently conflicting, but equally essential to Aristotelian thought about power, to be reconciled: affirming its positivity, all while introducing within it an indetermination” (p. 122, emphasis in original).

This is a really essential point about the nature of freedom. Besides developing the wholly new concept of being in potentiality, Aristotle distinguishes much more clearly than his predecessors between the more common notion of power and its exercise. Freedom belongs to the thoughtful exercise of definite powers and capabilities, not to any power in itself.

Next in this series: Critique of the Megarians

Reading Metaphysics Theta

This will be the first of several posts on Gwenaëlle Aubry’s detailed analysis of book Theta of Aristotle’s Metaphysics. Here I will cover her introductory remarks.

In Aristotle’s text, “the ontological sense of dunamis and energeia, which the use of the dative expression to dunamei kai energeiai indicates, will not be explored at the outset. We depart from the kinetic sense of these notions, designated as corresponding to their current usage, but not from the project of the inquiry. And it is only later that we will see how dunamis and energeia exceed what is said solely in relation to movement” (Dieu san la puissance, 2nd ed., ch. 4, pp. 117-118, my translation throughout).

“This extension, nonetheless, is also a deepening: the ontological sense will be progressively extracted from the kinetic sense, and the sense ‘sought’ from the current sense, but as that which the latter presupposes. For the notions of entelekheia [entelechy] and of ergon [a work] which the beginning of Theta highlights play a fundamental role in the transition from the kinetic sense to the ontological sense of energeia: it is they that mediate between energeia as the name of movement and energeia as a sense of being. And again, they allow it to be understood that energeia says being: not only subsistence or presence, but the function in which is accomplished the form or essence (en-ergon), and in this also the end (en-telos). Energeia is thus found coordinated with dunamis not only as the effective to the possible, but as the end toward which it tends” (p. 118).

“[T]he transition from the kinetic sense to the ontological sense goes hand in hand with a transfer from the model of efficiency and of the correlation of powers to that of finality and the actualization. of the in-potential. This last model, as we have seen, is already at work in the physical and biological writings, but Theta gives it an ontological foundation” (ibid).

Where I see Aristotle’s teleological and normative explanation of being as an alternative to impoverished articulations of first philosophy as “ontology” (i.e., a pure concern with being as existence, subsistence, or presence), Aubry instead chooses to retain the term “ontology”, while transforming it into a teleological and normative account. What she calls the ontological sense of the terms is for me their teleological sense.

“We must begin by studying the kinetic sense (or the sense that is at the same time kurios, first from the point of view of current usage, and me khresimotatos, not the most useful, not the one we seek)” (ibid).

This kind of approach, which takes ordinary language and what is commonly accepted as starting point but eventually moves beyond them, is very typical of Aristotle.

“This usual sense of dunamis is that which book Delta [on things said in many ways] already explored, but nonetheless did not consider in its correlation with energeia. If Theta resumes the first definition and the different senses distinguished by Delta, it nonetheless orders them and operates a sorting among them: thus dunamis is initially designated as equivocal, but among its significations, certain are designated as purely homonymic…. By contrast, the other senses of dunamis can all be referred to a primary sense: that of a ‘principle of change in another thing or in itself as another’. This primary sense of dunamis is indeed an active sense. Nonetheless, the definition proposed in Theta does not manifest this as such, since it does not indicate whether the change in question is enacted or undergone” (pp. 118-119).

“Thus in Delta as in Theta, the distinction between active power and passive power is effaced before the univoval characterization of dunamis as arkhe, as principle of change: or better, the distinction of active and passive is offered as a trait of change more than of the power that presides over it” (p. 119).

Arkhe, which Aubry here renders by the French cognate of “principle”, is what Sachs in his translations calls “source”. Dynamis at the “kinetic” level is a source or principle of motion and change, which renders Aristotle’s phrase for what got Latinized as the efficient cause.

I’m beginning to appreciate that Aubry is far from claiming that dynamis never means power in Aristotle. When I recently began studying this work more closely, I was initially confused to see her frequent use of the French puissance, as opposed to her emphatically preferred en-puissance. (I think at least once in an earlier post I substituted English “potentiality” — which I’ve been using for en-puissance — for what should have been “power” (for puissance) in my translation. Regardless of the grammatical form in the the Greek, Sachs and other English translators choose one word — “potency” for Sachs, “potentiality” in older translations influenced by the Latin. This makes the distinction Aubry is focusing on invisible.)

As things are coming more sharply into focus with this closer reading of her work on Aristotle, I now think these uses of puissance are her reflection of the nominative form used by Aristotle himself in many passages. As she says, the nominative form could denote an active power, but the dative form rules that out. According to Aubry, what she calls the ontological as opposed to the kinetic sense — the distinctively Aristotelian being-in-potentiality, as contrasted with the more generally recognized power to move things — is mainly associated with the dative. But the nominative nonetheless plays quite a large role in Aristotle’s text. And it is quite appropriate for the kinetic sense of dynamis, the one associated with motion and largely anticipated by Plato. But she has first emphasized the symmetry and reversibility of active and passive dynamis, and now suggested that dynamis is in a way indifferent to the distinction of active and passive.

She quotes Aristotle, “It is indeed evident that in a sense the power of acting and the power of undergoing are one” (p. 120).

“Principle of movement, dunamis can also be resistance to a movement of deterioration or of destruction: it is as such a state of impassibility, a hexis apatheias…. It is necessary to note that on the other hand, the capacity of resistance to a movement toward the better is not qualified as dunamis…. One notes already the gradation between a neutral sense and a normative sense that the notion of energeia will engage” (ibid).

“Dunamis, whether it be active or passive, is always found associated with a positivity and a possession (hexis). It is its contrary, impotency (adunamia) and the impotent (adunaton) that one associates with privation, steresis” (ibid).

“[P]ower, whether active or passive, remains univocally characterized as a principle of movement, and as being of the order of possession and of positivity” (p. 121, emphasis in original).

Next in this series: Rational and Natural Powers

Potentiality for Interaction

“Before being elucidated in Metaphysics Theta as a sense of being, dunamis appears in the physical texts as the instrument of the thought of change and action. It is thus thought in the order of the correlation not of the in-potentiality to act, but of active power to passive power. The model is the mechanistic one of efficiency. This model is nonetheless subsumed under another, which for the correlation active dunamis / passive dunamis, substitutes that of dunamis to energeia, thus integrating the schema of efficiency under that of finality. The definition of movement and its characterization as the common act of the mover and the moved appears as an essential moment of this integration: it invites us to see in kinesis [motion] not only the result of the interplay between two powers, one active and the other passive, but the transition between two states of being. Interaction thus appears only as the means for actualization, the play of powers as the occasion of the realization of the in-potentiality” (Aubry, Dieu san la puissance, 2nd ed., ch. 4, p. 103, my translation throughout).

This all seems very sound. I would add only two more nuances. First, not only is so-called efficient causality or Aristotle’s notion of “sources of motion” subsumed by final causality, but it also subsumes mechanistic “action” under a broader notion of “means”, as in the example from the Physics in which the art of building is what is most properly said to be the source of the motion of building a house. Aubry herself also speaks of interaction as a “means for actualization”.

Second, she speaks here of interaction because Aristotle analyzes even the most unilateral, mechanistic physical “action” as a special kind of interaction between active and passive powers. Although Aristotle would also agree with Kant against Leibniz that there is real interaction between things, that is not at stake in the contrast here. For Aristotle, all action is really a kind of interaction in the special sense mentioned above, but I think what he means primarily to contrast with actualization is action as such, not interaction as such. I would thus suggest the friendly amendment “action appears only as the means for actualization”. On the other hand though, she is emphasizing the fact that all action for Aristotle is really interaction, which is also extremely important.

In On Generation and Corruption book I, Aristotle describes cyclical transformations of the four elements. Aubry notes that the elements are there said to have neither forms of their own nor any principle of autonomous movement. The reciprocal action of the elements is explained in terms of active and passive dunamis.

“[A]ction has for effect an assimilation of the patient to the agent; but always in the case of a material agent, it can entail a passion in return…. If dunamis determines the agent as well as the patient, it is indeed according to a reversible schema, and in a relation of co-implication” (p. 104).

“This first formula, which accounts for action by the correlation of an active dunamis and a passive dunamis, is nonetheless succeeded by another, which substitutes for the pair of powers that of in-potentiality and of act” (ibid).

“The agent is no longer solely determined as active, but as in act…. As for the patient, it is not only passive, but in-potentiality. If there can be action of the one on the other, it is because the effect is already present, dunamei [in potentiality], in the patient: fire, for example, can only heat that which is already hot-in-potentiality” (ibid).

She quotes from book II: “That which is hot in-act is cold in-potentiality, and that which is cold in-act is hot in-potentiality, so that, at least if they don’t equalize themselves, they transform themselves the one into the other” (p. 105).

She continues, summarizing “This cycle obeys the principle of the best, and has a finality of its own” (ibid).

“All the same, the elements are deprived as much of active power as of spontaneity. Their movement toward a place should not be understood on the model of action, or of the interaction of an active power and a passive power, but on that of actualization, and of the correlation of the in-potentiality and the in-act” (ibid).

“The case of elemental change indeed appears as an example of the substitution of the model of actualization for that of interaction, and of the model of finality for that of efficiency. Aristotle starts from the place where mechanistic explanation seems the most justified: the first elements, the original impulses of matter. But precisely, these are not, like the dunameis that fill the khora [receptacle] of [Plato’s] Timaeus, brute and disordered forces: they are passive powers, deprived of self-motion and of spontaneity, but which nonetheless are principles of movement, and have an orientation or a tendency. Between them and their act, the active power, efficiency, only intervenes as an exterior cause; it is nothing more than the occasion for their actualization” (p.106).

Far from serving as the primary model for causality in general, efficient causality in Aristotle only provides occasions for more essential causes or reasons why to operate. It is always only a means for something, a kind of circumstantial catalyst.

On the Soul book II distinguishes “two degrees of dunamis. The first, according to ‘the genus and the matter’ is a non-exercised native capacity — that in virtue of which every human is capable, simply insofar as she is human and possessed of reason, of understanding grammar; the second is a capacity already employed, exercised, the effectuation of which requires no supplementary apprenticeship, but simply the will and the absence of obstacles…; and finally entelechy, or the actual exercise of knowledge” (p. 107).

“The case of perception, like that of elemental change, must be conceived as a transition from second dunamis to entelechy. This kind of alteration (alliosis) neither affects nor destroys the nature of the subject, but on the contrary is ‘a progress toward itself and toward entelechy'” (pp. 107-108).

“Nonetheless, in the case of the apprenticeship of knowledge, the passage from first dunamis to second dunamis should also be conceived as alteration-amelioration…. More than on the distinction between two degrees of dunamis and between movement (kinesis) and change (metabole), it seems it is necessary to insist on that between two types of alteration, the one privative and the other positive. This distinction underlines once again that the intervention of the efficient cause and of the external agent can serve as the occasion of an immanent progress” (pp. 108-109).

“In the transition between the model of interaction and the model of actualization, the definition of motion as the common act of the mover and the moved also appears as an essential moment” (p. 109).

“In Physics III, movement is defined as the entelechy of that which is in-potentiality as such…. Movement, otherwise said, is the act of the dunamis of a being not as such, but as mobile: the process of fabricating a statue is not the act of the brass as brass, but of the brass insofar as it becomes a statue. Immediately proposed, this definition is designed as a sort of default; of movement, in effect, one can say neither that it is privation, nor power, nor act; it is necessary, ultimately, as difficult as this may seem, to define it as an incomplete act, energeia ateles, in opposition to a simple act, energeia haple” (ibid).

“Movement indeed manifests the power of a being whatever it is, that is, independent of what it is, [independent] as well as of that by which such a being can become other than it is…. Movement is indeed the the entelechy of a power as such, since being a power is being a principle of movement, but the power is always the power of a being that by that movement becomes what it is. As consequence, the distinction is not between two powers, but between becoming as the being of power, and the being in view of which there is becoming” (p. 110).

“If the analysis of movement makes appeal to the distinction between mover and movable, and indeed between agent and patient, this distinction nonetheless finds itself relativized: in fact… the mover moves in being itself moved — since there exists also, Aristotle points out, an unmoved mover. The agent indeed is at the same time patient, and the patient in its turn can become agent, so that everything is both agent and patient, poietikon kai pathetikon. But to this it must be added that act is the same in the agent and the patient” (ibid).

“The duality of agent and patient, or of mover and moved, is reabsorbed thus, according to the point of view specified, into that of in-potentiality and in-act. In-potentiality, to dunamei, recovers active power and passive power equally well: it is a point of view taken on both powers insofar as they in principle belong to one and the same movement, or again, insofar as they are the subject of one and the same accomplishment” (p. 111).

Nothing in the real world is ever purely active or purely passive. It is hard to overstate the significance of this.

“In the same way that book III of the Physics subsumes the correlation of powers under movement as the act of the in-potential, book Theta of the Metaphysics places movement under energeia, understood this time not as ateles [incomplete], but as identical to the telos [end]” (ibid).

Next in this series: Reading Metaphysics Theta

Ethical Roots of Aristotelian Dynamis

“The notion of dunamis is present from the earliest writings of Aristotle, associated each time with an ethical context” (Aubry, Dieu san la puissance, 2nd ed., ch. 4, p. 100, my translation throughout). She cites studies of this issue by D. W. Graham and E. Berti.

The Protrepicus is an Aristotelian dialogue, famous in antiquity as an exhortation for people to learn philosophy, but surviving only in fragments quoted by other authors. According to Aubry, it discusses dynamis in terms still based on those of Plato’s Theaetetus — a kind of having, as distinct from use — but it already introduces Aristotle’s neologisms of energeia and entelecheia, or act and the closely related notion of entelechy. Significations according to act are already treated as focal, relative to significations according to dynamis.

“Finally, the distinction also shows a normative and teleological sense” (ibid).

“The notion of energeia is found associated not only with that of usage, but also with that of good usage and that of end, and by the latter ultimately with that of ergon [a completed work] — the text having ultimately for objective the determination of the ergon of the soul, not only its function but the act in which its end properly resides” (p. 101).

We saw recently that Plato already used ergon in a sense like this. Aristotelian energeia is the fulfilling activity from which the Platonic ergon emerges.

“It is with a normative and teleological sense that the notion of ergon intervenes again in fragment 6: the accomplishment of the ergon in effect is that in virtue of which a thing can be called good, agathos, that in which also resides its virtue, arete. For in the case of a composite being, this work cannot be immediately determined: constituted of different parts, such a being is also constituted of multiple acts and multiple powers. Its end resides in the accomplishment of its best work, its most proper dunamis, indeed that of that part of it in which its identity most resides. For the human, her end and her happiness reside in the accomplishment of the power of thinking, phronesis, which is at the same time her divine part and her most proper identity. The notion of dunamis is thus articulated to those of ergon and of energeia, which themselves are articulated to that of end, telos” (ibid).

Much of Aristotle’s most characteristic thought is expressed here. (On a side note, I am especially intrigued that phronesis or practical judgment is here explicitly assigned the same ultimate role that theoria or contemplation plays in the Nicomachean Ethics. I have long been skeptical of any sharp contrast between these two. See Aristotelian “Wisdom”.)

“The Protrepicus strongly associates notions that were present but disjoint in Plato: that of effective usage, of ergon and end, which are conjoined in Aristotle’s invented terms of energeia and entelecheia” (ibid).

She also points out a discussion of dynamis in book IV of the Topics, where it is opposed to choice based on deliberation. No one should be blamed for a dynamis. “One does not say of a human who is capable of acting badly that she is bad…. The bad is the one who is not only capable of evil, but chooses it…. Contrary to what Platonic aristocratism affirms, there are no naturally good or bad [rational beings]; in particular, it makes no sense to speak of someone as naturally virtuous: because virtue, the Nicomachean Ethics says, is not a dunamis, a native power, an innate quality, any more than vice is. It is a hexis, a disposition acquired… by means of repetition of one same act, and of which the actualization, in its turn, is suspended from prohairesis [choice grounded in deliberation]” (p. 102).

Next in this series: Potentiality for Interaction

Dynamis Before Aristotle

Before proceeding to Aristotle’s discussion of potentiality and act in book Theta of the Metaphysics, Aubry surveys pre-Aristotelian usages of the Greek word dynamis (or dunamis, as Aubry romanizes it). This detour adds further fascinating nuances to her already very rich discussion. (She also surveys Aristotle’s uses of dynamis in other works besides the Metaphysics. I will treat that part in a separate post.)

The meaning of dynamis in Homer and Hesiod is contested. A 1919 study by Joseph Souilhé concluded that it meant physical force in Homer, and royal or divine power in Hesiod. But a 2018 study by David Lefebvre concentrates on the phrase kata dunamin [“in accordance with” dynamis], and concludes on the contrary that already in Homer and Hesiod this is an expression of the Greek “sense of measure” and “wisdom of limits”. Aubry says that according to Lefebvre, for Homer and Hesiod, “To act kata dunamin is to act within the limits of a nature” (Dieu san la puissance, 2nd ed., ch. 4, p. 95, my translation throughout). Lefebvre sees in Plato a tension between a descriptive use of dynamis related to knowledge and definition, and a normative one related to what is proper to a given nature.

Turning to her own analysis of Plato, she says that in book V of the Republic, “dunameis are designated not as a sense of being, but as a genus of beings (genos ti ton onton); they are that by which ‘we can do what we can do, and in general every other thing can do precisely what it does’…. Dunamis is strongly associated with power and action. It does not help us say what a thing is, determining its distinctive properties, but rather what it can do, and what it does” (p. 96).

“This couple of power and action is associated neither with notions of latency and manifestation, nor with potentiality and effectivity” (p. 97). The thought here seems to be that Platonic power and action are more synchronic and in-the-moment than diachronic and involved with development.

On the other hand, already in Plato dynamis “is articulated to an ergon [work]” (p. 96). This is of the utmost importance. As we will see, for Plato ergon is not just any arbitrary product or outcome. It has an ethical significance.

“[Republic book I defines ergon] as either that which a thing is the only one capable of accomplishing, or that which it accomplishes better than all the others, and articulates it strongly with the notion of excellence, arete. As D. Lefebvre underlines, the articulation of dunamis to ergon, understood as a proper function allowing the deployment of an excellence, comes in play against the notion of indeterminate, non-normed power, the tyrannical or political ‘omnipotence’ to which the orators aspire, and of which, like book I of the Republic, the Gorgias presents a critique” (p. 96n).

Plato was extremely concerned to avoid the unprincipled political abuses of tyrants, and to combat the analogous unprincipled abuses of discourse by the Sophists. Neither the tyrant nor the Sophist nor the apologist for arbitrariness respects the good or the truth.

“In this articulation of the dunamis to the ergon, which nonetheless remains timid (the term ergon is not used, but only the [related] verb apergazetai), and is associated neither with a causal model nor with an ontology, one can already recognize a teleological and normative determination of power (here univocally characterized as active), in play against the idea of an undifferentiated and non-normed power” (pp. 96-97).

Plato thus partially anticipates Aristotle’s more developed teleological view.

In the Theaetetus, “Dunamis appears… as a power as much of possession as of usage, and not according to a progressive schema comparable to what Aristotle elaborates in De Anima [book] II [chapter] 5, where a native power (that for example which every human has to understand grammar) is transformed into a hexis [acquired disposition] by study, then can be exercised in an energeia, but according to a reversible and alternating schema” (p. 97).

Plato seems to emphasize a kind of symmetry in the relations between active and passive power, which makes them reversible. Aristotle subordinates this to the asymmetrical relation between act and potentiality, but it is important to recognize that he is not simply substituting an asymmetrical relation for a symmetrical one. Rather, he is fully accepting the symmetrical one, but then, so to speak, wrapping it in the asymmetrical one.

It is worth dwelling on the Platonic moment in its own right. There is already something quite profound in a truly symmetrical view of activity and passivity. Certainly there is also what might be called a vulgar view of activity and passivity that doesn’t recognize any symmetry between them at all. But that is not Plato’s view.

For the subtle initiates in the metaphor of the Theaetetus (in contrast to those non-initiates who count as being only what they can hold in their hands), Aubry notes that Plato says “the whole is movement […]; there are two forms of movement, each of infinite extension, but the one having the power to act, and the other to undergo” (quoted, pp. 97-98, ellipses in original). “It is at the same time, thus, that vision and the white are born, and they are not white and vision until that encounter: for something is an agent only by encountering a patient, only patient by encountering an agent, and that which in this encounter is agent can in another become patient” (p. 98).

Plato explicitly points out that what is an agent in one encounter may be a patient in another. The example of vision and the white also highlights the interdependence of what the moderns call subject and object.

“Power to act and power to undergo are at the same time relative to one another and reversible…. Active or passive dunamis is nonetheless articulated, beyond the epistemological context of the discussion, to an ontology: a paradoxical ontology, since, presented as subtle in that it reconciles being with becoming, it results in the negation of being to the benefit of becoming” (ibid).

Plato is famous for emphasizing eternal forms, but dialogues like Theaetetus and The Sophist invalidate many clichés about his broader views. This has the effect of bringing Plato closer to Aristotle.

“It is nonetheless in the Sophist that the ontological dimension of Platonic dunamis is most readable” (ibid). There the character known as the Eleatic Stranger (who expresses views contrary to — and to me far more interesting than — those of the historic Eleatics like Parmenides and Zeno) says “That which possesses a power, whatever it be, whether to act on no matter what other natural thing, or to undergo — even in a minimal degree, by the action of the weakest agent, and even if this occurs only once — all this, I say, really exists. And as a consequence, I pose as the definition that defines beings that they are nothing else but power” (quoted, pp. 98-99).

And again, this does not mean arbitrary power. Plato is after all the one who first said that the Good is the highest principle of all, even though Aristotle criticizes him for failing to explain how this works.

Aubry recounts that in the allegory of The Sophist, the Friends of the Earth are generally materialist, but accept the reality of virtues and vices. They therefore accept the Stranger’s definition of being as power, and this leads them also to change their minds and accept that the soul is a being too, since it is that in which virtues and vices are present. The Friends of the Forms on the other hand continue to resist the conclusion that “in ousia itself, insofar as it is known, and not only in in genesis, movement and passion occur” (p. 99). Aubry goes on, “but the Stranger and Theaetetus in their turn refuse what follows from that refusal: that being ‘solemn and sacred, stands immobile'” (ibid).

The Eleatic Stranger here is explicitly rejecting the historic Eleatic view of being, and at the same time Plato is implicitly rejecting the semi-Eleatic view of the “Friends of the Forms”. Aristotle indeed attributes to Plato the mistaken view that the forms are independent things, but he also says that Plato was initially influenced by the Heracliteanism of Cratylus, who is known for saying that you can’t step in the same river once, because it is always changing. There is no evidence that Plato was ever a Parmenidean. (Aristotle’s sharpest anti-Platonic remarks seem to me to be directed at Platonists, and perhaps at Plato’s successor Speusippus in particular.)

“Dunamis appears here as an instrument directed at the same time against the ‘materialists’, an extension of the notion of ousia to the incorporeal insofar as it posesses the power to act and to undergo, and, against the ‘idealists’, an inclusion in ousia, insofar as it is the object of knowledge, of traits considered by them to be characteristic of genesis: passion and movement” (ibid, emphasis in original).

Plato clearly wants to reject both the materialism of the Ionian pre-Socratics and the static One Being of Parmenides.

“From this brief examination of the principal places where Platonic dunamis is elaborated, one can conclude that the Aristotelian concept is found there ‘in potentiality’, by way of the normative articulation of dunamis to ergon, the distinction between capacity and effectivity, the project of an ontology unifying being and becoming, but only under the form of fragmentary and broken anticipations, which it remained for Aristotle to articulate and to systematize” (p. 100).

Next in this series: Ethical Roots of Aristotelian Dynamis