History of the Peloponnesian War

Make up your minds, therefore, to give them like for like; and do not let the victims who escaped the plot be more insensible than the conspirators who hatched it; but reflect what they would have done if victorious over you, especially as they were the aggressors.

It is they who wrong their neighbor without a cause, that pursue their victim to the death, on account of the danger which they foresee in letting their enemy survive; since the object of a wanton wrong is more dangerous, if he escape, than an enemy who has not this to complain of.

Do not, therefore, be traitors to yourselves, but recall as nearly as possible the moment of suffering and the supreme importance which you then attached to their reduction; and now pay them back in their turn, without yielding to present weakness or forgetting the peril that once hung over you.

Punish them as they deserve, and teach your other allies by a striking example that the penalty of rebellion is death. Let them once understand this and you will not have so often to neglect your enemies while you are fighting with your own confederates.’