“Our hypothesis is the following: the division of being into [being] in potentiality and [being] in act has a greater extension than that according to the categories. If the latter only determine the mobile and composed substances, act is said also of the immobile, and its priority over potentiality allows the relation of the immobile substance to the mobile substances to be thought” (Gwenaëlle Aubry, Dieu sans la puissance, 2nd ed., ch. 2, p. 51, my translation throughout).
“Dunamis [potentiality] and energeia [act] are the foundation of an anti-Parmenidean ontology, which articulates movement with being. They respond thus to the requirement defined in [book capital Alpha] for a science capable of giving account of both being and movement, both the one and the multiple. Since book Gamma, the notion of dunamis serves to resolve the dilemma of becoming: the posing of being in potentiality allows overcoming the impasse of emergence (that it is from non-being that being comes) as well as that of coexistence (that it is from contraries pre-existing in act that all being comes)” (pp. 51-52).
As Aristotle well recognizes, these impasses related to becoming imply that pre-Socratic notions of “being” were severely flawed.
“Invoked to think not only becoming, but the being of becoming, sensible and mobile substance, the notions of potentiality and act serve, over books Zeta and Eta, to replace those of matter and form. It is in book Theta, in backwards order, that the process finds its justification: the ontological pertinence of the two notions is there underlined, and their transfer from the field of movement to that of being, elucidated. At the end of book Theta, finally, are formulated the conditions for an extension of dunamis and energeia from the field of corruptible substances to that of eternal substances” (p. 52).
Again, for Aristotle, “eternal” means not radically outside of time as it does in Augustine, but simply persisting forever.
Aubry wants to recover a sense for Aristotelian being-as-such that is not the “absolutist” one of a first Being, argued for by excellent Thomist scholars like Joseph Owens. In passing, she cites Aristotle’s aversion to pursuing ultimate explanation in terms of “numbers, lines, or fire” (p. 53). As Aristotle says in book Gamma, “for us too it is the first causes of being as being that must be gotten hold of” (ch. 1, Sachs tr., coincidentally also p. 53). Aubry notes that this also takes us beyond any consideration of being as a genus or species.
But in spite of the fact that being is not a genus, the first causes for Aristotle are common to all beings. She refers to the “focal” meaning of being as ousia, while arguing that ontology is not reduced to the study of substance. She alludes to Aristotle’s inclusion of the knowledge of axioms and the principle of non-contradiction in the knowledge of being, while pointing out that the principle of non-contradiction is not a cause. She notes how Aristotle first mentions then dismisses incidental sayings of being, and the saying of being in the sense of true and false.
She discusses Pierre Aubenque’s argument that being in the senses of the Categories is more fundamental than potentiality and act, commenting that it encounters a difficulty in Aristotle’s explicit development of a sense for potentiality and act that goes beyond their use in the explanation of motion. She notes that Franz Brentano among others argues the opposite: potentiality and act are not reducible to the categories. She doesn’t think Aristotle addresses this question of priority explicitly; any answer will be based on analysis of what Aristotle does with the respective terms.
Both the categories and potentiality and act are at the basis of a non-Parmenidean ontology. The pair of potentiality and act in particular allows for the articulation of “a certain non-being” within being. Saying according to the categories, too, generates affirmations that from a Parmenidean point of view would be paradoxical. Every predication says that something “is” something other than just what it is.
“Potentiality is in effect the place where contraries can coexist” (p. 61). “It allows becoming to be thought without violating the founding principle of being and of discourse [non-contradiction]” (p. 62). “In opposition to the Eleatics, the distinction of potentiality and act plays the same role as that of substance and accident against the Sophists: it founds the possibility of predication. The accent is nonetheless inverse: if it serves, in Gamma 3, to reconnect the diversity of predicates to the unity and the identity of a subject, it serves here to relate one same subject to the possible plurality of predicates” (ibid).
“There is nonetheless one thing that dunamis and energeia say that the categories do not say: the becoming other of the same, the becoming multiple of the one” (ibid). Here she recalls Aristotle’s polemic against the Megarians in book Theta. The Megarian denial of the difference between act and potentiality makes becoming unintelligible, because it eliminates all continuity within change. This makes the explanation of change impossible.
“Dunamis thus appears as the very instrument of the thought of becoming” (p. 66). And “not only becoming, but being in becoming” (ibid).
Next in this series: Mixing Up Plato and Aristotle
The Postmodern Peripatetic 