"Trying to define yourself is like trying to bite your own teeth." [Alan Watts]
Self-made man first recorded 1832, Amer.Eng.
"[Self-interest] is a doctrine not very lofty, but clear and sure. It does not seek to attain great objects; but it attains those it aims for without too much effort. ... [It] does not produce great devotion; but it suggests little sacrifices each day; by itself it cannot make a man virtuous; but it forms a multitude of citizens who are regulated, temperate, moderate, farsighted, masters of themselves; and if it does not lead directly to virtue through the will, it brings them near to it insensibly through habits." [Alexis de Tocqueville, "Democracy in America"]
"Let us understand what our own selfish genes are up to, because we may then at least have the chance to upset their designs." [Richard Dawkins, "The Selfish Gene," 1976]