If one knows only what one is told, one does not know enough to be able to arrive at a well-balanced decision.

Even if we accept, as the basic tenet of true democracy, that one moron is equal to one genius, is it necessary to go a further step and hold that two morons are better than one genius?

In science it is not enough to think of an important problem on which to work. It is also necessary to know the means which could be used to investigate the problem.

We turned the switch, saw the flashes, watched for ten minutes, then switched everything off and went home. That night I knew the world was headed for sorrow.

When a scientist says something, his colleagues must ask themselves only whether it is true. When a politician says something, his colleagues must first of all ask, 'Why does he say it?

You may assume infinite ignorance and unlimited intelligence.

If the thickness is larger than the critical value I can produce an explosion.