It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.

Science is the great antidote to the poison of enthusiasm and superstition.

The fewer the facts, the stronger the opinion.

What is a scientist after all? It is a curious man looking through a keyhole, the keyhole of nature, trying to know what's going on.

Science is organized common sense where many a beautiful theory was killed by an ugly fact.

I see nothing in space as promising as the view from a Ferris wheel.

Few tragedies can be more extensive than the stunting of life, few injustices deeper than the denial of an opportunity to strive or even to hope, by a limit imposed from without, but falsely identified as lying within.

Adventure upon all the tickets in the lottery, and you lose for certain and the greater the number of your tickets the nearer your approach to this certainty.

I believe in general in a dualism between facts and the ideas of those facts in human heads.

Every great advance in science has issued from a new audacity of imagination.