The Republic by Plato Part 1 Page 86

other body, that body is, to begin with, rendered incapable of united action by reason of sedition and distraction; and does it not become its own enemy and at variance with all that opposes it, and with the just?

Is not this the case?

Yes, certainly.

And is not injustice equally fatal when existing in a single person; in the first place rendering him incapable of action because he is not at unity with himself, and in the second place making him an enemy to himself and the just? Is not that true, Thrasymachus?

Yes.

And O my friend, I said, surely the gods are just?

Granted that they are.

But if so, the unjust will