"Love. Fall in love and stay in love. Write only what you love, and love what you write. The key word is love. You have to get up in the morning and write something you love, something to live for."
"If we listened to our intellect we'd never have a love affair. We'd never have a friendship. We'd never go in business because we'd be cynical: "It's gonna go wrong."Or "She's going to hurt me."Or,"I've had a couple of bad love affairs, so therefore . . ."Well, that's nonsense. You're going to miss life. You've got to jump off the cliff all the time and build your wings on the way down."
"There is more than one way to burn a book. And the world is full of people running about with lit matches."
"Without libraries what have we? We have no past and no future."
"We are an impossibility in an impossible universe."
"Science fiction is any idea that occurs in the head and doesn't exist yet, but soon will, and will change everything for everybody, and nothing will ever be the same again. As soon as you have an idea that changes some small part of the world you are writing science fiction. It is always the art of the possible, never the impossible."