The things that you do should be things that you love, and things that you love should be things that you do.

The only science fiction I have written is Fahrenheit 451. It's the art of the possible. Science fiction is the art of the possible. It could happen. It has happened.

They are so confident that they will run on forever. But they won't run on. They don't know that this is all one huge big blazing meteor that makes a pretty fire in space, but that some day it'll have to hit.

Mars is empty now. Five hundred years from now, it'll be full of people.

The first thing a writer should be is - excited. He should be a thing of fevers and enthusiasms. Without such vigor, he might as well be out picking peaches or digging ditches; God knows it'd be better for his health.

We have everything we need to be happy, but we aren't happy. Something's missing.

Live as if you'd drop dead in ten seconds.