The Republic by Plato Part 1 Page 83

them, and may be holding many of them in subjection?

True, he replied; and I will add that the best and most perfectly unjust state will be most likely to do so.

I know, I said, that such was your position; but what I would further consider is, whether this power which is possessed by the superior state can exist or be exercised without justice or only with justice.

If you are right in your view, and justice is wisdom, then only with justice; but if I am right, then without justice.

I am delighted, Thrasymachus, to see you not only nodding assent and dissent, but making answers which are quite excellent.

That is out of civility to you, he replied.