My copy of Gwenaëlle Aubry’s Genèse du dieu souverain arrived today, and I’ve started to look at the front matter. She begins by explaining why Aristotelian potentiality and actuality are not reducible to concepts of power and action. In the Metaphysics, the most sophisticated sense of being and substance is associated with the pair en dunamei and energeia. Whereas the grammatical nominative form dunamis could connote an active power, she says the dative form en dunamei was used by Aristotle precisely to distinguish from this. The other essential distinguishing feature of Aristotle’s approach was to make the en dunamei dependent on an energeia (act, actuality, or at-work-ness), a term of Aristotle’s own invention. In French, Aubry translates en dunamei for potentiality as en-puissance, as distinct from the puissance that means power.
“[Potentiality] names, for a given being, the principle of a movement oriented by the act that is also its end and its proper good” (p. 10, my translation throughout). Actuality and potentiality, she says, thus provide an alternative model to that of efficient causality based on the relation between an active and a passive power.
“In the same way that potentiality is not power (active or passive), act is not action. Act does not act [L’act n’agit pas]. On the contrary, it names that for which we act or move: the telos or end, which is also the good” (ibid). Nor should the relation between potentiality and actuality be reduced to that between matter and form. She notes that Aristotle never referred to god as “pure form”.
She observes that book Lambda of the Metaphysics (1071a 4-5) singles out potentiality and actuality as applicable by analogy to all substances of all kinds. (Scholars debate whether “by analogy” adequately translates Aristotle’s pros hen or “toward one”, but that is a side issue.) “This assures at the same time the generality of the ontological discourse and the real primacy of the theological principle” (ibid). (I prefer to avoid the term “ontology”, but that is another side issue.)
“Determining [god] as pure act, [Aristotle’s view based on potentiality and actuality] poses [god] as at the same time identical with the good” (p. 11). She reads Aristotle’s statement of the project of the Metaphysics in book Alpha as “posing the good as a principle and identifying the causality proper to it” (p. 12). The Latin medieval tradition mostly followed Avicenna in treating the Metaphysics as what Duns Scotus called ontology, but the great commentator Averroes characterized the Metaphysics as a philosophical theology, and Aubry also calls it an axiology, or study of goodness and value.