No intelligent man has any respect for an unjust law.

Take care of the cojones and the frijoles will take care of themselves. Try to have getaway money - but don't be fanatic about it.

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

Does history record any case in which the majority was right?

I think that science fiction has a distinct therapeutic value because all of it has as its primary postulate that the world does change. I cannot overemphasize the importance of that idea.

Teaching causes people to go into situations from which they cannot escape, except by thinking. Do not handicap children by making their lives easy.

In this complex world, the scientific method, and the consequences of the scientific method are central to everything the human race is doing and to wherever we are going.