I'm afraid of coaching, of writer's classes, of writer's magazines, of books on how to write. They give me centipede trouble - you know the yarn about the centipede who was asked how he managed all his feet? He tried to answer, stopped to think about it, and was never able to walk another step.

Behind every mystery lies another mystery.

Autobiography is usually honest but it is never truthful.

Selfishness is the bedrock on which all moral behavior starts and it can be immoral only when it conflicts with a higher moral imperative.

Never try to outstubborn a cat.

A handy short definition of almost all science fiction might read: realistic speculation about possible future events, based solidly on adequate knowledge of the real world, past and present, and on a thorough understanding of the nature and significance of the scientific method.

Progress isn't made by early risers. It's made by lazy men trying to find easier ways to do something.