Never memorize something that you can look up.

We are boxed in by the boundary conditions of our thinking

My pacifism is not based on any intellectual theory but on a deep antipathy to every form of cruelty and hatred.

It takes a touch of genius - and a lot of courage to move in the opposite direction.

Strange is our situation here on Earth. Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose. From the standpoint of daily life, however, there is one thing we do know: that man is here for the sake of other men - above all for those upon whose smiles and well-being our own happiness depends.

[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.

The concept of marriage must have been thought up by an unimaginative pig.