For the same reason, some people think that the just man is as able to act unjustly as justly, for he is not less but rather more capable than another of performing the several acts, e.g. of lying with a woman or of striking a blow, as the courageous man is rather more capable than another of throwing away his shield and turning his back and running away anywhere. But to play the coward or to act unjustly means not merely to do such an act (though the doer might be said “accidentally” to act unjustly), 135 but to do it in a certain frame of mind; just as to act the part of a doctor and to heal does not mean simply to apply the knife or not to apply it, to give or to withhold a drug, but to do this in a particular fashion.