If life is going to exist in a Universe of this size, then the one thing it cannot afford to have is a sense of proportion.

No one has yet discovered any warlike purpose to be served by the theory of numbers or relativity, and it seems very unlikely that anyone will do so for many years.

I can accept the theory of relativity as little as I can accept the existence of atoms.

Relativity applies to physics, not ethics.

Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That's relativity.

If my theory of relativity is proven correct, Germany will claim me as a German and France will declare that I am a citizen of the world. Should my theory prove untrue, France will say that I am a German and Germany will declare that I am a Jew.