Book 2
8
But he seems to feel less pain, because desire is for what is pleasant, and he follows his desire; so that the uncontrolled man rather acts voluntarily and not under force, because not painfully. On the other hand persuasion is thought to be the opposite of force and necessity; and the self-controlled man is led towards things that he has been persuaded to pursue, and proceeds not under force but voluntarily; whereas desire leads a man on without employing persuasion, since it possesses no element of rational principle.
9
It has, then, been stated that these men only seem to act under force and involuntarily; and we have shown the reason—it is because their action has a certain resemblance to forced action, just as we speak of forced action even in the case of inanimate objects too.
10
Yet nevertheless if one added there also the addition made in our definition, the statement is refuted. For we speak of a thing as being forced to act when something external moves it or brings it to rest, acting against the impulse within the thing itself—when there is no external motive, we do not say that it acts under force; and in the uncontrolled man and the self-controlled it is the impulse present in the man himself that drives him (for he has both impulses), so that as far as these considerations go neither of them would be acting under force, but voluntarily;
