Man, in so far as he is determined to a particular action because he has inadequate ideas, cannot be absolutely said to act in obedience to virtue; he can only be so described, in so far as he is determined for the action because he understands.
Proof .-- In so far as a man is determined to an action through having inadequate ideas, he is passive (III.

i.), that is (III.
Deff.i., and iii.), he does something, which cannot be perceived solely through his essence, that is (by IV.Def.

viii.), which does not follow from his virtue.

But, in so far as he is determined for an action because he understands, he is active; that is, he does something, which is perceived through his essence alone, or which adequately follows from his virtue.
Q.E.D.
PROP.XXIV.

To act absolutely in obedience to virtue is in us the same thing as to act, to live, or to preserve one's being (these three terms are identical in meaning) in accordance with the dictates of reason on the basis of seeking what is useful to one's self.
Proof .-- To act absolutely in obedience to virtue is nothing else but to act according to the laws of one's own nature.