Every animal leaves traces of what it was; man alone leaves traces of what he created.

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.

Has there ever been a society which has died of dissent? Several have died of conformity in our lifetime.

The great poem and the deep theorem are new to every reader, and yet are his own experiences, because he himself recreates them.

The world today is made, it is powered by science; and for any man to abdicate an interest in science is to walk with open eyes towards slavery.

I set out to show that there exists single creative activity,which is displayed alike in the arts and in the sciences.It is wrong to think of science as a mechanical record of facts, and it is wrong to think of the arts as remote and private fancies. What makes each human, what makes them universal, is the stamp of the creative mind.

The hand is the cutting edge of the mind.