I have no special talent. I am only passionately curious. The important thing is to not stop questioning. Curiousity has its own reason for existing.

I have survived two wars, two wives and Hitler.

Of all the communities available to us, there is not one I would want to devote myself to except for the society of the true seekers, which has very few living members at any one time.

Imagination is everything. It is the preview of life's coming attractions.

The relativity principle in connection with the basic Maxwellian equations demands that the mass should be a direct measure of the energy contained in a body; light transfers mass. With radium there should be a noticeable diminution of mass. The idea is amusing and enticing; but whether the Almighty is laughing at it and is leading me up the garden path -- that I cannot know.

Never memorize something that you can look up.

Our defense is not in our armaments, nor in science, nor in going underground. Our defense is in law and order.