Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

I agree with Schopenhauer that one of the most powerful motives that attracts people to science and art is the longing to escape from everyday life.

I never think of the future. It comes soon enough. When visiting the U.S. from Germany for a winter academic stay.

I believe that the horrifying deterioration in the ethical conduct of people today stems from the mechanization and dehumanization of our lives. A disastrous by-product of the development of the scientific and technical mentality. We are guilty. Man grows cold faster than the planet he inhabits.

I would absolutely refuse any direct or indirect war service and would try to persuade my friends to do the same, regardless of the reasons for the cause of a war.

As long as there are sovereign nations possessing great power, war is inevitable.

I must be willing to give up what I am in order to become what I will be.