A hundred times every day I remind myself that my inner and outer life are based on the labors of others.

To be sure, it is not the fruits of scientific research that elevate a man and enrich his nature, but the urge to understand, the intellectual work, creative or receptive.

The genius is in making the complex simple.

Yes, we now have to divide up our time like that, between politics and our equations. But to me our equations are far more important, for politics are only a matter of present concern. A mathematical equation stands forever.

It has often been said, and certainly not without justification, that the man of science is a poor philosopher.

The idle man does not know what it is to enjoy rest.

Creativity is seeing what others see and thinking what no one else has ever thought.