Money cannot buy happiness, but it can make you awfully comfortable while you're being miserable. Nothing prevents happiness like the memory of happiness.
Andre GideEnvying another man's happiness is madness; you wouldn't know what to do with it if you had it.
Andre GideNo theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.
Andre Gide