Let us then ascertain in how many different senses we call a man unjust.
Firstly, he who breaks the laws is considered unjust, and, secondly, he who takes more than his share, or the unfair man.
Plainly, then, a just man will mean (1) a law-abiding and (2) a fair man.
A just thing then will be (1) that which is in accordance with the law, (2) that which is fair; and the unjust thing will be (1) that which is contrary to law, (2) that which is unfair.
But since the unjust man, in one of the two senses of the word, takes more than his share, the sphere of his action will be good things—not all good things, but those with which good and ill fortune are concerned, which are always good in themselves, but not always good for us—the things that we men pray for and pursue, whereas we ought rather to pray that what is good in itself may be good for us, while we choose that which is good for us.