No utopia can ever give satisfaction to everyone, all the time. As their material conditions improve, men raise their sights and become discontented with power and possessions that once would have seemed beyond their wildest dreams. And even when the external world has granted all it can, there still remain the searchings of the mind and the longings of the heart.

I'm quite fond of the writer who told a beginning author, "If you've got a message, use Western Union."

Much blood has also been spilled on the carpet in attempts to distinguish between science fiction and fantasy. I have suggested an operational definition: science fiction is something that COULD happen - but usually you wouldn't want it to. Fantasy is something that COULDN'T happen - though often you only wish that it could.

The truth, as always, will be far stranger.

I want to be remembered most as a writer - one who entertained readers, and, hopefully, stretched their imagination as well.

The exploration of the planets is now closer to us in time than the exploration of Africa by Stanley and Livingstone.

Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying.