History of the Peloponnesian War

But they, from being accustomed to have intercourse with us on a fair footing, if contrary to their notions of right they have been worsted in any thing, either by a legal judgment or by the power of our empire, even in any degree whatever; they feel no gratitude for not being deprived of the greater part [of their possessions], but are more indignant for what is lost than if from the first we had laid aside law, and openly taken advantage of them.

In that case not even they themselves would have denied that it was right for the weaker to yield to the stronger. But when injured it seems men are more angry than when treated with violence: for the one case is regarded as an advantage taken by their compulsion by their superior.