All responsible writers, to some degree, have become involuntary criers of doom, because doom is in the wind; but science fiction writers more so, since science fiction has always been a protest medium.

Science Fiction is literature about the future, telling stories of the marvels we hope to see–or for our descendants to see–tomorrow, in the next century, or in the limitless duration of time.

If my doctor told me I had only six minutes to live, I wouldn’t brood. I’d type a little faster.

Reality is frequently inaccurate.

Reality is that which, when you stop believing in it, doesn’t go away.

Language exists less to record the actual than to liberate the imagination.

The purpose of a storyteller is not to tell you how to think, but to give you questions to think upon.

Many people have tried to define science fiction. I like to call it the literature of exploration and change. While other genres obsess upon so-called eternal verities, SF deals with the possibility that our children may have different problems. They may, indeed, be different than we have been.

Sometimes I think we’re alone in the universe, and sometimes I think we’re not. In either case, the idea is quite staggering.

Fiction is simply dreams written out. Science fiction consists of the hopes and dreams and fears (for some dreams are nightmares) of a technically based society.

“Books are keys that open many doors”

The main thing about aliens is that they are alien. They feel no responsibility for fulfilling any of your expectations.