They had not yet attained the stupefying boredom of omnipotence; their experiments did not always succeed.

In this universe the night was falling; the shadows were lengthening towards an east that would not know another dawn. But elsewhere the stars were still young and the light of morning lingered; and along the path he once had followed, Man would one day go again.

The best measure of a man's honesty isn't his income tax return. It's the zero adjust on his bathroom scale.

My favorite definition of an intellectual: 'Someone who has been educated beyond his/her intelligence'.

I doubt if there is a single field of study so theoretical, so remote from what is laughingly called everyday life, that it may not one day produce something that will shake the world.

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.

If man can live in Manhattan, he can live anywhere.