Our world faces a crisis as yet unperceived by those possessing power to make great decisions for good or evil. The unleashed power of the atom has changed everything save our modes of thinking and we thus drift toward unparalleled catastrophe.

The best design is the simplest one that works.

Insofar as we may at all claim that slavery has been abolished today, we owe its abolition to the practical consequences of science

Opinions about obviousness are to a certain extent a function of time.

But there is another reason for the high repute of mathematics: it is mathematics that offers the exact natural sciences a certain measure of security which, without mathematics, they could not attain.

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.

Newton did not know what happened to the apple, and I can prove this when the next eclipse comes.