When you sit with a nice girl for two hours, it seems like two minutes; when you sit on a hot stove for two minutes, it seems like two hours. That's relativity.

Whatever there is of God and goodness in the universe, it must work itself out and express itself through us. We cannot stand aside and let God do it.

I believe the most important mission of the state is to protect the individual and make it possible for him to develop into a creative personality.

I never made one of my discoveries through the process of rational thinking

Unless the cause of peace based on law gathers behind it the force and zeal of a religion, it hardly can hope to succeed.

This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.

For every one billion particles of antimatter there were one billion and one particles of matter. And when the mutual annihilation was complete, one billionth remained - and that's our present universe.