It is really a puzzle what drives one to take one's work so devilishly seriously.

We are boxed in by the boundary conditions of our thinking

From the standpoint of daily life, however, there is one thing we do know: that we are here for the sake of each other.

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

Strive not to be a success, but rather to be of value.

Great spirits have always found violent opposition from mediocre minds. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence.

Only a monomaniac gets anything done.