What do-gooders lack is not happiness but innocence. They lack that happy blindness that allows most people, most of the time, to shut their minds to what is unbearable. Do-gooders have forced themselves to know, and keep on knowing, that everything they do affects other people, and that sometimes (though not always) their joy is purchased with other people’s joy. And, remembering that, they open themselves to a sense of unlimited, crushing responsibility.

