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 Lambda: Introduction

“Book Lambda of the Metaphysics responds to the exigencies defined in book capital Alpha: to pose the good as a principle; and to determine its proper mode of causality as being that of a final cause, and not an efficient or formal cause. These two exigencies are resolved in a single proposition: the principle is act, and is without power. Act here receives its full signification: it is act and not form that is the mode of being of separate substance; but act also serves to name the good as a principle” (Gwenaëlle Aubry, Dieu san la puissance, 2nd ed., ch. 5, p. 153, my translation throughout).

We saw last time that pure act (energeia) for Aristotle — unlike any being in subcelestial nature — has the character of unmixed necessity. This is true because pure act is the only thing that fully is what it is. It is the admixture of power (dynamis) and in-potentiality (dynamei) in other things that is the source of their contingency, as not being pure act.

“If the concepts of dunamis and energeia simultaneously unify ousiology and integrate theology into it, they also bear all the singularity of the Aristotelian thought of being, and within it of the first being, insofar as the latter is conceived not as an excess of power, but as the reality of the good” (p. 154).

Ousiology would be an account of ousia, or what we call “substance” from the Latin. Again, the first cause is not first in the sense of time, but first in the sense that all other things depend on it. The whole point of calling it pure act is to separate it from the contingency of the dependent things that have power and potentiality.

The very idea of an “excess of power” is utterly alien to Aristotle. We saw before that he understands power as always being power for something definite. Only those things that also have a dependency on something outside of themselves have this kind of “power” at all, corresponding to an unrealized in-potentiality. This “power” and potentiality are the mark of their contingency, not of implacable might.

It is Plato and Plotinus who on the other hand associate superlative power with the Good or the One. But Aristotle criticizes Plato for failing to explain how the Good acts as a cause. Then Plotinus later attempts to answer Aristotle’s criticism by adapting and dwelling upon the novel theme of the excessive character of the One’s power that first emerges in the Judeo-Christian tradition.

“To read book Lambda in a unitary manner, and to find this unity in ontology, that is to say in the sense of being that dunamis and energeia express, is not at all to deny or to minimize its theological content. It is on the contrary to affirm the unity of metaphysics, against the onto-theological readings that scission it between a science of common being and a science of the first being. It is also to recognize a continuity among the different treatises that have come down to us under the name of the Metaphysics” (p. 156).

“The date of composition of book Lambda is debated by commentators. But it is necessary in any case to distinguish between the historical question of its editorial status and that of its conceptual relation to the other books of the Metaphysics, with regard to the problems to which responds to, displaces, or resolves, the analyses that it deepens” (ibid).

“The problems treated in the central books [Zeta–Eta–Theta], and most especially in book Theta, seem to us to be decisive. In Lambda, the elucidation of [1] the ontological sense of dunamis and energeia that orients Theta in its entirety; [2] the analogical relation between them in Theta 6; and [3] the anteriority of act over in-potentiality subsequently developed in Theta 8, furnish the conceptual basis as much for the analogical unification of the principles of substance, as for the principal position of ousia energeia” (ibid).

“Massively mobilized in Lambda 6 and 7, [the notions of dunamis and energeia] are absent from the introductory chapter that constitutes Lambda 1, as from the analyses of Lambda 3, and little present in Lambda 8 and 10. Nonetheless, the successive and modulated interventions of dunamis–energeia (or — and it is necessary for us to ask ourselves about this variation, of their dative form dunamei–energeia) over the course of Lambda serve each time to respond to the different questions raised in Lambda 1, which serve as the program for the book in its entirety: what is a principle (notably in its difference from an element, stoicheion, or a cause, aitia)? What are the principles common to sensible substances? What is the nature of separate substance (is it a form or not)? Finally, and these two questions are intrinsically linked, in what way is separate substance a cause, and are there principles common to all substances, sensible or separate?” (p. 157).

Here Aubry notes that while still maintaining his own preferred sense of “separate” ousia (separate as subsisting with relative independence with respect to other things) as distinct from that of Plato (separate as independent of matter subject to becoming), Aristotle nonetheless in this part of the text turns to ask questions about substance that is separate in both of these senses.

“Going forward, we will be able to extract a unitary principle for all substances, sensible or separate, that is not reducible to the unity of the material composite; and at the same time to maintain, under the auspices of this unity, a hierarchy that is not episodic or disjunctive” (p. 158).

What makes the hierarchy of substance not episodic or disjunctive in Aristotle is the explanation he provides for the mode of causality of the end and the good as that for the sake of which.

“Lambda 2 will thus substitute the notion of in-potentiality for that of matter, in order to extend it, beyond the corruptible sensible substances, to the eternal sensible substances. This positive result is followed in Lambda 3 by a negative, but decisive, result, since we will establish, against Plato, that form cannot be separate. In Lambda 4, it is this time against its reduction to an element [i.e., a constituent in the material sense] by those who wrote about nature, that the notion of principle will be redefined” (ibid).

For Aristotle, a principle of something is never reducible to a constituent part of it, and what any given thing “is” is always more than a mere sum of its parts.

“The veritable pivot of book Lambda, chapter 5 goes on to integrate these various results, negative as well as positive: the extension of dunamis to the eternal sensibles; the exclusion of form from consideration as the mode of the being of the separate; the distinction between principle and element; and going forward, [chapter 5] brings two fundamental responses to the questions posed in the introductory chapter: separate substance must be conceived as act and not as form; and dunamis and energeia are, by analogy, the principles common to all sensible substances” (ibid).

“On this basis, the central concern of chapters 6-10 will consist in determining and exploring the mode(s) of relation between separate substance and the other substances. Lambda 6 having demonstrated that separate substance as ousia energeia is the condition of the movement of the other substances, it remains to identify its mode of causality as being that of the end (Lambda 7) and of the good (Lambda 9), but also the way in which this causality operates in the case of the eternal sensibles (Lambda 8), and, finally, the whole universe (Lambda 10)” (ibid).

The whole universe coheres intelligibly, both insofar as it realizes the good, and insofar there are also explanations when things fall short or go wrong. The world we live in is not a mere whole made up of discrete parts, as the pre-Socratic writers on nature tended to assume. Neither is it the mere sequence of disconnected episodes that follows from the Platonic sole emphasis on what Aristotle calls formal causes.

Next in this series: Physics and Theology

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 as Separable

“At this point in Theta 8, we have completed, by the mediation of the terms telos [end] and ergon [completed work], the justification of the equivalence between the superior terms of the analogy, energeia [act], kinesis [motion], and ousia [“substance”], just as we have justified that between the inferior terms, dunamis [power] and hyle [matter]. But in so doing, we have also subsumed one analogical relation under the other, by showing in the correlation dunamis–kinesis a particular case of the correlation hyle–ousia: power serves as a means for matter to attain the form posed as end, and indeed as a means for the coming to be of substance as unity of matter and form, movement itself being able to serve, in the case of transitive activities, as end and as realization of essence. We have thus completed the transition from the kinetic sense to the ontological sense of dunamis and energeia, and at the same time established the priority of the ontological sense over the kinetic sense.”

“The end of Theta 8 nonetheless begins another process: this no longer aims at showing the ontological sense of dunamis and energeia, but at extending their field of application beyond the corruptible sensible substances” (Aubry, Dieu san la puissance, 2nd ed., ch. 4, p. 141, my translation throughout, Becker number citations to the Greek text omitted).

Aristotle regards the stars as eternal (or more precisely, sempiternal) sensible beings, because on a human time scale their motions and other characteristics appear to be unchanging. From this perspective, he understands not only the first cause but all astronomical entities in terms of pure act (energeia), without any admixture of power (dynamis), or of being that is only in-potentiality (dynamei). But these are still sensible beings subject to motion, so they occupy an intermediate place between terrestrial things and the first cause.

This association with eternity and pure act goes along with his view that unlike terrestrial things, the stars move by necessity. Again, for Aristotle this just means always in the same way. Here he does speak of “what cannot not be”, but I think this is only a consequence of his definition of necessity. It is a reflection of the logical truth that if we say something always occurs in a certain way, then we are committed to saying it cannot not occur in that way, simply because “always” implies “never not” — and not anything stronger than that.

Aristotle’s argument, which ultimately aims to draw conclusions about the first cause from an analysis of things closer to us, is made somewhat easier by the existence of this intermediate case of eternal sensible substances in his conceptual schema. But it does not seem to me that any of his arguments about pure act really depends on this common-sense assumption that the stars are eternal.

Even if we have a different conception of astronomical entities, according to which they just exist on a much longer time scale than terrestrial things, the conceptual distinction of a separable pure act remains available to us. (Hegel, for example, develops a version of it that has no connection to astronomy, and instead appeals only to the lasting ethical and cultural achievements of rational beings.) (See also Grammatical Prejudice?.)

“Act can in effect only be attributed to the eternal sensible substances on the condition of being dissociated from dunamis, redefined as the power of contradiction (in the same way, it will only be able to be extended in book Lambda to the simple substance on the condition of the exclusion of movement). But insofar as Theta 6 introduced it as indissociable from its correlation with in-potentiality, it is the very understanding of the notion of act that seems to be called into question: how do we understand energeia without in-potentiality? What kind of act is it that is no longer the unity of matter and form in the end? Can we under these conditions maintain its identity to ousia?”

“These questions will only find a definitive response in book Lambda. Theta 8 is content to begin the process of the extension of energeia: the notion is in effect applied to the eternal sensible substances. For this application allows us to extract yet another sense, and a more fundamental one, of the anteriority of act according to ousia: if act is anterior to in-potentiality according to ousia, this is also because, contrary to in-potentiality, it characterizes such substances. For these are more so substances than the perishable sensible substances” (ibid).

In the analysis of things around us that are in becoming, we see the underlying modalities of in-potentiality and in-act functioning in an interdependent way. But if we look at in-potentiality and in-act just as modalities, only one depends on the other. That is just what the priority of act is intended to convey.

Aubry sees a new distinction introduced here for the first time. Aristotle first explicitly mentions that dynamis may have effects that are not only contrary but contradictory, and at the same time specifies in-potentiality is a mode of being that can be resolved to act in contradictory alternative ways. But it seems to me that this has been implicit from the moment that talk about potentiality for contraries was introduced. And in the bigger picture, Aristotle’s whole insistence on the priority of act over potentiality and the asymmetry in the relation between them seems to have been designed from the start to support considerations of the independence of act from potentiality.

There could be no potentiality without something being in act. But it is very clear that for Aristotle, the relation of potentiality to act is asymmetrical. By contrast, activity and passivity are completely symmetrical, so it is impossible to have the one without the other. But potentiality depends on act, whereas act seems to be the very thing that makes something an ousia malista, or what is most of all a substance. The criterion for this is precisely “separability” or independence relative to other things. Potentiality seems ubiquitous to us because it is a necessary component of all the terrestrial things we are accustomed to, not because act in principle has any dependency on it. Or such seems to be Aristotle’s argument.

Aubry already emphasized in her reading of book Zeta that for Aristotle, what distinguishes ousia malista is its separability, or ability to have being on its own. But Zeta’s discussion focuses on perishable sensible substances, and therefore on applying this kind of separability to concrete composites of form and the familiar kind of (non-celestial) matter. Here for the first time Aristotle explicitly addresses eternal sensible substances.

“The correlation of in-potentiality and act is here broken: act is no longer presented as the end and the principle of dunamis, but as excluding it. Energeia and dunamis name opposed modes of being, where one is proper to the necessary, as that which cannot not be, the other to the contingent, as that which can be or not be. Dissociated from dunamis, energeia remains on the other hand associated with kinesis [motion]: in effect, the eternal sensible substances are in movement. But movement in their case is not the transition from one state of being to another, or from in-potentiality to act: exclusive of in-potentiality, it is confounded with their very act — by which we indeed verify that for certain beings kinesis can serve as telos [end] and as manifestation of being. Finally, dissociated from in-potentiality, this movement remains no less associated with matter, or at least a certain kind of matter” (pp. 142-143).

“[E]ven though the correlation of in-potentiality to act has been broken among the eternal sensible substances, it operates again between these and the corruptible sensible substances” (pp. 143-144).

“[A]ct can be not only another name for the ousia composed of matter and form (or for matter as realized in a form, the form in a matter), but for ousia as such. Act thus comes to name a superior degree of being, which, insofar as it is exempt from in-potentiality, is characterized by necessity, understood as the impossibility of not being” (p. 144).

“In-potentiality, as being able to be or not be, names an inferior degree of being, which characterizes contingency, but remains no less correlated to act in a relation of dependency that also marks act’s anteriority according to ousia” (ibid).

Aristotle’s text does clearly suggest that astronomical entities are somehow superior to terrestrial things, and it relates this superiority to the notion that they are purely in-act. But a modern understanding of astronomical entities expressed in Aristotelian terms would be that contrary to what Aristotle thought, they are not in fact purely in-act.

There is, however, an alternate basis for vindicating the “superiority” of the celestial over the terrestrial. The cosmos is inconceivably more vast than the earth, and for modern science too causally subsumes and includes it, analogous to the way that Aristotle thought it did.

Since childhood I have felt a fascination for the vastness of space and time, that could include distant galaxies and dinosaurs. Completely unlike Pascal’s famous terror at being so small in this vastness, I experienced this with only the profound wonder that Aristotle identifies as the beginning of philosophy.

Even if we do not regard astronomical entities as eternal sensible substances, I think Aristotle for his part would have no trouble endorsing Kant’s expression of the two great wonders, “the starry heavens above and the moral law within”.

Next in this series: Book Theta: Summing Up

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