To fit in with the change of events, words, too, had to change their usual meanings. What used to be described as a thoughtless act of aggression was now regarded as the courage one would expect to find in a party member; to think of the future and wait was merely another way of saying one was a coward; any idea of moderation was just an attempt to disguise one's unmanly character; ability to understand a question from all sides meant that one was totally unfitted for action. Fanatical enthusiasm was the mark of a real man, and to plot against an enemy behind his back was perfectly legitimate self-defence . . . and indeed most people are more ready to call villainy cleverness than simple-mindedness honesty. They are proud of the first quality and ashamed of the second.
Thucydides, The Peloponnesian War III, 82, trans. Rex Warner, The Penguin Classics, pp. 209-210)