No scientist thinks in formulae.

Fear or stupidity has always been the basis of most human actions.

Personally, I experience the greatest degree of pleasure in having contact with works of art. They furnish me with happy feelings of an intensity that I cannot derive from other sources.

The goal of pacifism is possible only though a supranational organization. To stand unconditionally for this cause is the criterion of true pacifism.

I am doing just fine, considering that I have triumphantly survived Nazism and two wives.

Don't second guess the mistakes you've made, others will do that for you. Make things as simple as possible, but not simpler.

It is difficult even to attach a precise meaning to the term "scientific truth." So different is the meaning of the word "truth" according to whether we are dealing with a fact of experience, a mathematical proposition or a scientific theory. "Religious truth" conveys nothing clear to me at all.