One original thought is worth the sum total of human knowledge, because it advances the sum total of human knowledge by that one original thought.

One original thought is worth the sum total of human knowledge, because it advances the sum total of human knowledge by that one original thought.

Fifty years from now if an understanding of man's origins, his evolution, his history, his progress is not in the common place of the school books we shall not exist.

The progress of science is the discovery at each step of a new order which gives unity to what had seemed unlike.

Astronomy is not the apex of science or of invention. But it is a test of the cast of temperament and mind that underlies a culture.

The world is made up of people who never quite get into the first team and who just miss the prizes at the flower show.

The problem of values arises only when men try to fit together their need to be social animals with their need to be free men. There is no problem, and there are no values, until men want to do both. If an anarchist wants only freedom, whatever the cost, he will prefer the jungle of man at war with man. And if a tyrant wants only social order, he will create the totalitarian state.