Cherish the questions, for the answers keep changing.

I know very well that many scientists consider dowsing as they do astrology, as a type of ancient superstition. According to my conviction this is, unjustified. The dowsing rod is a simple instrument which shows the uncanny reaction of the human nervous system to certain factors which are unknown to us at this time.

My scientific work is motivated by an irresistible longing to understand the secrets of nature and by no other feeling. My love for justice and striving to contribute towards the improvement of human conditions are quite independent from my scientific interests.

Is it not better for a man to die for a cause in which he believes, such as peace, than to suffer for a cause in which he does not believe, such as war?

Formerly, people thought that if matter disappeared from the universe, space and time would remain. Relativity declares that space and time would disappear with matter.

My relationship to the Jewish people has become my strongest human bond, ever since I became fully aware of our precarious situation among the nations of the world.

The scientist finds his reward in what Henri Poincare calls the joy of comprehension, and not in the possibility of application to which any discovery may lead.