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

Looking back, nothing seems so simple than a utopian vision realised.

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

In 1492 Columbus knew less about the far Atlantic than we do about the heavens, yet he chose not to sail with a flotilla of less than three ships. . . . So it is with interplanetary exploration: it must be done on the grand scale.

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

I find it as difficult to understand a scientist who does not acknowledge the presence of a superior rationality behind the existence of the universe as it is to comprehend a theologian who would deny the advances of science.

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