Spacemen - men who work in space, pilots and jetmen and astrogators and such - are men who like a few million miles of elbow room.

There is no such thing as luck; there is only adequate or inadequate preparation to cope with a statistical universe.

Secrecy is the beginning of tyranny

There are hidden contradictions in the minds of people who "love Nature" while deploring the "artificialities" with which "Man has spoiled Nature.'" The obvious contradiction lies in their choice of words, which imply that Man and his artifacts are not part of "Nature" : but beavers and their dams are.

One of the sanest, surest, and most generous joys of life comes from being happy over the good fortune of others.

If I had a Boy Scout I could make a fire by rubbing his hind legs together.

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.