The history of scientific and technical discovery teaches us that the human race is poor in independent and creative imagination.

Children don’t heed the life experiences of their parents, and nations ignore history. Bad lessons always have to be learned anew.

I urge a willingness to reserve a place in rational science for non-rational wonder.

In matters of trust and justice there can be no distinction between big problems and small, for the general principles which determine the conduct of men are indivisible. Whoever is careless with the truth in small matters cannot be trusted in important affairs.

It is my inner conviction that the development of science seeks in the main to satisfy the longing for pure knowledge.

If we have the courage to decide ourselves for peace we will have peace.

I'd rather be an optimist and a fool than a pessimist and right.