“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