A disposition is often only understood by looking at its opposite, and so the discussion of justice will include an examination of injustice as well. The unjust man is grasping in the sense that he seeks goods which are not goods in themselves, and often sacrifices higher goods for the sake of lesser goods.
All lawful things are in some sense just.
The law orders us to perform the actions of a virtuous man through certain commands and prohibitions. Thus justice according to the law is complete virtue but not in the unqualified sense. For this reason justice is often thought to be the best of the virtues, since the end of justice is that of complete virtue. The just man acts for what is expedient for someone else. The worst man is one whose evil habits affect both himself and his friends, while the best man is one whose virtue is directed to others rather than himself.