Concern for man himself and his fate must always form the chief interest of all technical endeavors, concern for the great unsolved problems of the organization of labor and the distribution of goods-in order that the creations of our mind shall be a blessing and not a curse to mankind. Never forget this in the midst of your diagrams and equations.

Ethical axioms are found and tested not very differently from the axioms of science. Truth is what stands the test of experience.

If you cannot explain it simply, you do not understand it enough.

The value of achievement lies in the achieving.

Just as with the man in the fairy tale who turned whatever he touched into gold, with me everything is turned into newspaper clamor.

I am an absolute pacifist...It is an instinctive feeling. It is a feeling that possesses me, because the murder of men is disgusting.

Creative energy is more critical than learning.