"There's something in us that is very much attracted to madness. Everyone who looks off the edge of a tall building has felt at least a faint, morbid urge to jump. And anyone who has ever put a loaded pistol up to his head... All right, my point is this: even the most well-adjusted person is holding onto his or her sanity by a greased rope. I really believe that. The rationality circuits are shoddily built into the human animal."