I am an optimist. Anyone interested in the future has to be otherwise he would simply shoot himself.

The dinosaurs disappeared because they could not adapt to their changing environment. We shall disappear if we cannot adapt to an environment that now contains spaceships, computers - and thermonuclear weapons.

To be a science fiction writer you must be interested in the future and you must feel that the future will be different and hopefully better than the present. Although I know that most - that many science fiction writings have been anti-utopias. And the reason for that is that it's much easier and more exciting to write about a really nasty future than a - placid, peaceful one.

Good morning, doctors. I have taken the liberty of removing Windows 95 from my hard drive.

Anything that is theoretically possible will be achieved in practice, no matter what the technical difficulties are, if it is desired greatly enough.

A well-stocked mind is safe from boredom.

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