Intelligence makes clear to us the interrelationship of means and ends. But mere thinking cannot give us a sense of the ultimate and fundamental ends. To make clear these fundamental ends and valuations and to set them fast in the emotional life of the individual, seems to me precisely the most important function which religion has to form in the social life of man.

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

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

It is a very grave mistake to think that the enjoyment of seeing and searching can be promoted by means of coercion and a sense of duty.

Falling in love is not at all the most stupid thing that people do - but gravitation cannot be held responsible for it.

To me the worst thing seems to be a school principally to work with methods of fear, force and artificial authority. Such treatment destroys the sound sentiments, the sincerity and the self-confidence of pupils and produces a subservient subject.

Don't become a seeker of success. Become a person of value.