There are, as I have stated, two cases which produce anger: first, when we appear to have received an injury, about which enough has been said, and, secondly, when we appear to have been treated unjustly: this must now be discussed. Men think some things unjust because they ought not to suffer them, and some because they did not expect to suffer them: we think what is unexpected is beneath our deserts. Consequently, we are especially excited at what befalls us contrary to our hope and expectation: and this is why we are irritated at the smallest trifles in our own domestic affairs, and why we call our friends’ carelessness deliberate injury. How is it, then, asks our opponent, that we are angered by the injuries inflicted by our enemies? It is because we did not expect those particular injuries, or, at any rate, not on so extensive a scale. This is caused by our excessive self-love: we think that we ought to remain uninjured even by our enemies: every man bears within his breast the mind of a despot, and is willing to commit excesses, but unwilling to submit to them. Thus it is either ignorance or arrogance that makes us angry: ignorance of common facts; for what is there to wonder at in bad men committing evil deeds?