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

Distinguishing Act and Form

“In fact, the notions of form (eidos) and of act (energeia or entelecheia) are not equivalent; and if the first belongs to a Platonic vocabulary, the second is an Aristotelian invention. It belongs, as such, to an anti-Platonic project: there is no sense, for Aristotle, in posing ‘pure’ or ‘separated’ forms, that is to say forms subsisting outside of and independent of the composites that they define. Form is not separable except ‘by logos‘, ‘according to the formula’, which signifies also that form is not fully ousia, fully substance” (Gwenaëlle Aubry, Dieu sans la puissance, 2nd ed., part 1, introduction, p. 23, my translation throughout).

For Aristotle, form is only separable from the embodied composite analytically, in speech or in thought. Though he was Plato’s star pupil for 20 years and continued to be influenced by Plato in other ways, his project is “anti-Platonic” in the sense that he specifically criticizes the notion of separate form, with which Plato is famously associated.

“It goes otherwise for act, which implies separation, understood as autonomous subsistence, and therefore has the value of another name for ousia. Act, nonetheless, is not only another name for substance. Identified with the end, it is also [identified] with the good. Being in act is not only to subsist, it is to subsist as adequate to its form and to a form that, posed as end, is also posed as good…. Act thus is not only another name for being, but also for the good: or more, insofar as it says the good as real, or as realized, [it] names the identity of being and the good” (p. 24).

Here it is important to recall once again that all the senses of “being” Aristotle discusses in the Metaphysics involve being as a transitive verb (i.e., being this or that), not being as a noun. Being in the sense of existence simply has no place in this account. The identity of the senses of being as a transitive verb with those of the good tells us that the saying of transitive being for Aristotle has a normative character. Talking about the being or essence of things is talking about value, and making value judgments.

“Certainly, [the idea of] the unmoved First Mover does not come in response to the question of the emergence of being, but to that of the eternity of movement — both the continuity of the movement of the stars, and the perpetuity of the cycle of generation and corruption. This is why [book] Lambda [chapter] 10 [of the Metaphysics] can also designate the good as the cause of taxis [order], associated both with the movement of the eternal sensibles and that of the corruptible sensibles. If it is not an efficient cause, the First Mover nonetheless has an efficacity, or an influence on the world, which follows from the very fact that it has no power. For the purely actual substance, indeed excluding power as much as movement, is required as the condition of movement (Lambda 6 and 7). Again, it is necessary to determine the way in which it is [required]; Lambda 7 invokes the notion of final cause, which it is nonetheless necessary to understand in a particular sense: not in a sense in which the unmoved substance is itself the act and the end of the other substances, but in the sense in which, aiming at their proper act, the latter aim at the same time at its characteristic necessity. To understand this, it is not necessary to have recourse to the notion of imitation: the relation of the pure act to the substances mixed of act and potentiality is determined by the different relations of the anteriority of act to potentiality distinguished in Theta 8.” (p. 25).

Aristotle is saying that the good in general or value in general is a condition for the possibility of all movement, both celestial and terrestrial. Every being is moved by some good or other. Aubry is here explaining the difference between Aristotle’s own view and the “ontotheology” that Heidegger and others have attributed to him.

“[The pure act’s] efficacy could be called non-efficient; its strength merges with the desire it arouses. Designating god as act, Aristotle identifies his mode of being; determining the mode of relation of act to potentiality, he identifies his mode of action….”

“But by this, Aristotle also identifies the mode of being and the mode of action proper to the good. It is perhaps thus that it is necessary to understand his insistence in affirming that he is, of all the philosophers, the first and the only to have posed the good as a principle….”

“The singularity of the Aristotelian theology as a theology of the good, and of the power proper to the good, can nonetheless not be known except on the condition of taking seriously the designation of the First Mover as pure act. This supposes in particular that the Aristotelian inventions that are act and potentiality are not reduced to form and power. The Aristotelian theology, that is to say the science of unmoving and separate substance, appears only in effect as one of the areas of application of an ontology or, at least, a general ousiology, which has for its foundation the notions of act and potentiality” (p. 26).

In contrast to the ways being is said in the senses of the Categories, which are “inadequate for speaking about the first unmoving being, [act and potentiality] allow both the difference and the relation of moved and unmoved substances to be thought. In a more general way, act and potentiality are at the foundation of an anti-Parmenidean ontology, …allowing being, movement, and their correlation equally well to be thought” (p. 27).

Aubry points out that the notions of act and potentiality first arise in the discussion of motion. But book Theta of the Metaphysics is dedicated to reshaping them in a way that applies to “being” as well as to motion. It is more particularly through act and potentiality that beings are constituted as the beings they are.

“Movement, in effect, should not be understood only in the order of interaction, but also in that of actualization. Or again: movement should not be understood only in the order of the correlation of an active dynamis and a passive dynamis, partitioning the field of efficiency into an agent and a patient, but in that of the correlation of dynamis and energeia” (ibid).

“But the dynamis found thus to be correlated to act, and which designates a state of being, is therefore irreducible to power: being in potentiality, coordinated with and determined by act, is neither passive nor efficient. Or again, potentiality is reducible neither to active power nor to passive power. The notion of potentiality serves to name the very possibility of the interaction of an agent and a patient in view of a change determined and finalized by act.”

“The correlation of potentiality to act nonetheless does not exclude that of passive power to active power: but it subsumes it, or subordinates it, insofar as it carries a greater intelligibility. It invites us to consider that which, in an impact, a meeting, or an interaction, is the occasion of an accomplishment. It is a point of view taken on that which, in movement, makes itself, that is to say not only makes itself but perfects itself…. Aristotle’s universe is not exempt from impacts and meeting: the substances that populate it are not Leibnizian monads…. The order of efficiency is a real order, but subordinate to that of finality” (pp. 28-29; see also The Four Causes Revisited).

“Potentiality is indeed for a being the real possibility, inscribed in the very qualities that give it its essence, of realizing that essence. Potentiality is the index and the principle of the becoming that leads a being to its accomplishment. It bears at the same time the distance between a being and what it has to be, and the possibility of crossing that distance. If act names the identity, real or realized, of being and the good, potentiality names this identity as to be realized. It inscribes into being at the same time as the concreteness of mediation, the possibility of perfection” (p. 29).

“The ontology of potentiality bears with it at the same time the thought of a possible perfection, realizable here and now, and that of failures, of accidents, of bad encounters, of unsuccessful mediations that could counter it” (ibid).

For Aristotle there is no “problem of evil”. Things are at one and the same time both imperfect and perfectible.

Again, I prefer to drop the term “ontology” altogether, because it is strongly associated with a (non-Aristotelian) approach to first philosophy that focuses on being as a noun, and in the sense of existence. Aubry retains the traditional term, but gives it a different meaning that is less prejudicial.

Far be it from me to claim to have the one true interpretation of these sharply contested points about Aristotle’s Metaphysics, but the key features of Aubry’s account seem to fit very well with my own examination of the text.

Aubry has emphasized the role of Plotinus in the historic re-interpretation of Aristotelian act and potentiality. I would note that the later neoplatonic school at Alexandria under Ammonius (5th/6th century CE) — especially Ammonius’ students Simplicius and John Philoponus — also produced extensive commentaries on Aristotle with a neoplatonic slant, which helped shape the way Aristotle was read in medieval times.

Ammonius argued that Aristotle’s first cause is after all also an efficient cause. Simplicius, who is also a major source for quotes from lost works in the history of Greek philosophy, added two more distinctly neoplatonic kinds of causes to Aristotle’s four. Philoponus was a Christian Aristotelian who defended creation from nothing, and was cited by Galileo as an inspiration for the impulse theory of motion. The impulse theory decouples physical motion from any teleology, paving the way for early modern mechanism.

Next in thus series: Aristotle on the Platonic Good