[When asked "Dr. Einstein, why is it that when the mind of man has stretched so far as to discover the structure of the atom we have been unable to devise the political means to keep the atom from destroying us?"] That is simple, my friend. It is because politics is more difficult than physics.

To get to know a country, you must have direct contact with the earth. It's futile to gaze at the world through a car window.

If I were wrong, wouldn't one be enough?

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

One must not attempt to justify them, but rather to sense their nature simply and clearly.

We have penetrated far less deeply into the regularities obtaining within the realm of living things, but deeply enough nevertheless to sense at least the rule of fixed necessity... what is still lacking here is a grasp of the connections of profound generality, but not a knowledge of order itself.

It's not that I'm so smart.