I feel like I own all the kids in the world because, since I've never grown up myself, all my books are automatically for children.

I decided that was the greatest idea I had ever heard. I started writing every day. I never stopped.

An athlete may run ten thousand miles in order to prepare for one hundred yards. Quantity gives experience.

We must move into the universe. Mankind must save itself. We must escape the danger of war and politics. We must become astronauts and go out into the universe and discover the God in ourselves.

When I finished [writing it], I was crying. I knew at long last, after ten years of trying, I had written something good.

I'm not trying to PREDICT the future. I'm just trying to PREVENT it.

We are an impossibility in an impossible universe.