I have firmly decided to bite the dust with a minimum of medical assistance when my time comes, and up to then to sin to my wicked heart's content.

The most precious things in life are not those you get for money.

Science will stagnate if it is made to serve practical goals.

A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended its area of applicability.

This is too difficult for a mathematician. It takes a philosopher. The hardest thing in the world to understand is the income tax.

I have remained a simple fellow who asks nothing of the world; only my youth is gone - the enchanting youth that forever walks on air.

Future medicine will be the medicine of frequencies.