"I've had only one idea in my life - a true idee fixe. To put it as bluntly as possible - the idea of having my own way. 'Control!' expresses it. The control of human behavior. In my early experimental days it was a frenzied, selfish desire to dominate. I remember the rage I used to feel when a prediction went awry. I could have shouted at the subjects of my experiments, 'Behave, damn you! Behave as you ought!"