A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.
Robert A. HeinleinIt's an indulgence to sit in a room and discuss your beliefs as if they were a juicy piece of gossip.
Robert A. HeinleinIf it can't be expressed in figures, it is not science; it is opinion. It has long been known that one horse can run faster than another - but which one? Differences are crucial.
Robert A. HeinleinFirst you must learn to control your self. The rest follows. Blessed is he who knows himself and commands himself, for the world is his and love and happiness and peace walk with him wherever he goes.
Robert A. HeinleinMoving parts in rubbing contact require lubrication to avoid excessive wear. Honorifics and formal politeness provide lubrication where people rub together. Often the very young, the untravelled, the naive, the sophisticated deplore these formalities as 'empty,' 'meaningless,' or 'dishonest,' and scorn to use them. No matter how 'pure' their motives, they thereby throw sand into machinery that does not work too well at best.
Robert A. Heinlein