My scientific work is motivated by an irresistible longing to understand the secrets of nature not by other feelings.

When we are working at something, we come down from our high logical horse and sniff around with our nose to the ground. Then we obliterate our traces in order to become more God-like.

The only thing that you absolutely have to know, is the location of the library.

The feeling for what ought and ought not to be grows and dies like a tree, and no fertilizer of any kind will do much good. What the individual can do is give a fine example, and have the courage to firmly uphold ethical convictions in a society of cynics. I have for a long time tried to conduct myself this way, with varying success.

There will come a point in everyone's life , however, where only intuition can make the leap ahead, without ever knowing precisely how. One can never know why but one must accept intuition as a fact.

It may be possible to fight intolerance, stupidity, and fanaticism seperately, but when they come together there is no hope.

Striving for peace and preparing for war are incompatible with each other, and in our time more so than ever.