Humans hardly ever learn from the experience of others. They learn - when they do, which isn't often - on their own, the hard way.
Robert A. HeinleinThe brown monkey's instinct to kill is correct; such men are dangerous to all monkey customs.
Robert A. HeinleinBeing privileged to work hard for long hours at something you think is worth doing is the best kind of play.
Robert A. Heinlein