Vice and related to it as a part to a whole, and some “Unjust” related to that which is co-extensive with violation of the law as a part to a whole.
Again, suppose one man seduces a man's wife with a view to gain and actually gets some advantage by it,1 and another does the same from impulse of lust, at an expense of money and damage; this latter will be thought to be rather destitute of self-mastery than a grasping man, and the former Unjust but not destitute of self-mastery: now why? plainly because of his gaining.
Again, all other acts of Injustice we refer to some particular depravity, as, if a man commits adultery, to abandonment to his passions; if he deserts his comrade, to cowardice; if he strikes another, to anger: but if he gains by the act to no other vice than to Injustice.
Thus it is clear that there is a kind of Injustice different from and besides that which includes all Vice, having the same name because the definition is in the same genus; for 1131bboth have their force in dealings with others, but the one acts upon honour, or wealth, or safety, or by whatever one name we can include all these things, and is actuated by pleasure attendant on gain, while the other acts upon all things which constitute the sphere of the good man's action.
Now that there is more than one kind of Justice, and that there is one which is distinct from and besides that which is co-extensive with, Virtue, is plain: we must next ascertain what it is, and what are its characteristics.
Well, the Unjust has been divided into the unlawful and the unequal, and the Just accordingly into the lawful and the equal: the aforementioned Injustice is in the way of the unlawful. And as the unequal and the more are not the same, but differing as part to whole (because all more is unequal, but not all unequal more),2 so the Unjust and the Injustice we are now in search of are not the same with, but other than, those before mentioned, the one being the parts, the other the wholes; for this particular Injustice is a part