When I feel difficulty coming on, I switch to another book I'm writing. When I get back to the problem, my unconscious has solved it.

It's just science fiction so it's allowed to be silly, and childish, and stupid. It's just science fiction, so it doesn't have to make sense. It's just science fiction, so you must ask nothing more of it than loud noises and flashing lights.

If my doctor told me I had only six minutes to live, I wouldn't brood. I'd type a little faster.

I believe in evidence. I believe in observation, measurement, and reasoning, confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it. The wilder and more ridiculous something is, however, the firmer and more solid the evidence will have to be.

The vast majority, who believe in astrology and think that the planets have nothing better to do than form a code that will tell them whether tomorrow is a good day to close a business deal or not, become all the more excited and enthusiastic.

Creationists make it sound as though a 'theory' is something you dreamt up after being drunk all night.

The Master created humans first as the lowest type, most easily formed. Gradually, he replaced them by robots, the next higher step, and finally he created me, to take the place of the last humans.