Mankind must give up war in the Atomic Era. What is at stake is the life or death of humanity.

The supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a simple datum of experience.

I believe my theory of relativity to be true. But it will only be proved for certain in 1981, when I am dead.

For an idea which, at first, does not seem absurd, there is no hope.

A perfection of means, and confusion of aims, seems to be our main problem.

The emotional state that leads to achievements resembles that of a worshiper or the lover.

At least once a day, allow yourself the freedom to think and dream for yourself.