Again, in such cases as this last, what men dispute about is usually not whether the deed was done or not, but what the justice of the case is; for it is an apparent injustice that stirs the assailant’s wrath. There is a difference between cases of this kind and disputes about contracts: in the latter the question is a question of fact, and one or other of the parties must be a vicious character, unless his memory be at fault; but in these cases they agree about the facts, but differ as to which side is in the right (whereas the deliberate aggressor knows very well the rights of the case), so that the one thinks that he is wronged, while the other thinks differently. 131

But if a man hurt another of set purpose, he acts unjustly, and acts of injustice ( i.e. violations of what is proportionate and fair), when so done, stamp the doer as an unjust character.

In like manner a man is a just character when he of set purpose acts justly; but he is said to act justly if he merely do voluntarily that which is just.