What distinguishes the language of science from language as we ordinarily understand the word? ... What science strives for is an utmost acuteness and clarity of concepts as regards their mutual relation and their correspondence to sensory data.

A true genius admits that he/she knows nothing.

The true definition of madness is repeating the same action, over and over, hoping for a different result.

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

Germany had the misfortune of becoming poisoned, first because of plenty, and then because of want.

I believe that I have really found the relationship between gravitation and electricity, assuming that the Miller experiments are based on a fundamental error. Otherwise, the whole relativity theory collapses like a house of cards.

Mankind must give up war in the Atomic Era. What is at stake is the life or death of humanity.