In my experience of human behaviour (and I've seen all there is to see, it's fair to say), I've concluded there aren't but five motivations for a man to do anything. They're hardly mysterious, you know: money, hunger, lust, power, survival. That's all there is. You hear in the courtrooms and in the cinema all sorts of fancy-dress explanations why someone becomes Prime Minister or kills his neighbours. But if you listen hard, it's all just the same five balls, juggled up in the air, decorated with distracting words. No one ever did a damn thing but for one of those five.