The 3-legged stool of understanding is held up by history, languages, and mathematics. Equipped with those three you can learn anything you want to learn. But if you lack any one of them you are just another ignorant peasant with dung on your boots.
Robert A. HeinleinTake care of the cojones and the frijoles will take care of themselves. Try to have getaway money - but don't be fanatic about it.
Robert A. HeinleinA competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.
Robert A. Heinlein