Because other people are not living to satisfy your expectations. YOUTH: Indeed. PHILOSOPHER: Then, when those expectations are not satisfied, they become deeply disillusioned and feel as if they have been horribly insulted. And they become resentful, and think, That person didn’t do anything for me; That person let me down; That person isn’t my comrade anymore. He’s my enemy. People who hold the belief that they are the centre of the world always end up losing their comrades before long.
