The commonest weakness of our race is our ability to rationalize our most selfish purposes.
Robert A. HeinleinTheology is never any help; it is searching in a dark cellar at midnight for a black cat that isn't there. Theologians can persuade themselves of anything.
Robert A. HeinleinHumans 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. Heinlein