The ancients knew something, which we seem to have forgotten.

It is my belief that the problem of bringing peace to the world on a supranational basis will be solved only by employing Gandhi's method on a larger scale.

One scientific epoch ended and another began with James Clerk Maxwell.

I think that only daring speculation can lead us further and not accumulation of facts.

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

Is it not better for a man to die for a cause in which he believes, such as peace, than to suffer for a cause in which he does not believe, such as war?

I do not play games. There is not time for it. When I get through with work, I don't want anything that requires the working of the mind.