Book 5
16
And for this very reasoni.e., that acting unjustly is in our own power, 9.14. men think that the just man will act unjustly no less than justly, because the just man is not less but rather more able than another to do any particular unjust thing: for example, he can lie with a woman, or strike a blow, and a brave man can throw away his shield, and can wheel to the right or left and run away. But to be a coward and to be guilty of injustice consists not in doing these things (except accidentally), but in doing them from a certain disposition of mind; just as to be a physician and cure one’s patients is not a matter of employing or not employing surgery or drugs, but of doing so in a certain manner.
17
Claims of justice exist between persons who share in things generally speaking good, and who can have too large a share or too small a share of them. There are persons who cannot have too large a share of these goods: doubtless, for example, the gods. And there are those who can derive no benefit from any share of them: namely, the incurably vicious; to them all the things generally good are harmful. But for others they are beneficial within limits; and this is the case with ordinary mortals.
