It must be wonderful to be seventeen, and to know everything.

If man survives for as long as the least successful of the dinosaurs-those creatures whom we often deride as nature's failures-then we may be certain of this: for all but a vanishingly brief instant near the dawn of history, the word 'ship' will mean- 'spaceship.'

Civilization will reach maturity only when it learns to value diversity of character and of ideas.

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.

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

Any path to knowledge is a path to God-or Reality, whichever word one prefers to use

One of the great tragedies of mankind is that morality has been hijacked by religion.