Aristotle - index for METAPHYSICA Book 9 Part 2

Rational and non-rational potencies

Paragraph 1 Since some such originative sources are present in soulless things, and others in things possessed of soul, and in soul, and in the rational part of the soul, clearly some potencies will, be non-rational and some will be non-rational and some will be accompanied by a rational formula.
Paragraph 2 And each of those which are accompanied by a rational formula is alike capable of contrary effects, but one non-rational power produces one effect;
Paragraph 3 It is obvious also that the potency of merely doing a thing or having it done to one is implied in that of doing it or having it done well, but the latter is not always implied in the former:

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