The best computer is a man, and it’s the only one that can be mass-produced by unskilled labor.

Get me a broom. I'll sweep my own office.

The greatest gain from space travel consists in the extension of our knowledge. In a hundred years this newly won knowledge will pay huge and unexpected dividends.

I believe in an immortal soul. Science has proved that nothing disintegrates into nothingness. Life and soul, therefore, cannot disintegrate into nothingness, and so are immortal.

Conquering the universe one has to solve two problems: gravity and red tape. We could have mastered gravity.

Man belongs wherever he wants to go - and he'll do plenty well when he gets there.

Science and religion are not antagonists. On the contrary, they are sisters. While science tries to learn more about the creation, religion tries to better understand the Creator. While through science man tries to harness the forces of nature around him, through religion he tries to harness the force of nature within him.