If you love people you criticize them, and if you don't love them you don't criticize them, you let them go to hell, don't you? To help any kind of friendship, your marriage, your children, you criticize because you love.

Every morning I jump out of bed and step on a landmine. The landmine is me. After the explosion, I spent the rest of the day putting the pieces together.

Facts quite often, I fear to confess, like lawyers, put me to sleep at noon. Not theories, however. Theories are invigorating and tonic. Give me an ounce of fact and I will produce you a ton of theory by tea this afternoon. That is, after all, my job.

I was not predicting the future, I was trying to prevent it.

Quantity produces quality. If you only write a few things, you're doomed.

Science fiction is the most important literature in the history of the world, because it's the history of ideas, the history of our civilization birthing itself. ...Science fiction is central to everything we've ever done, and people who make fun of science fiction writers don't know what they're talking about.

Jump, and you will find out how to unfold your wings as you fall.