Most people say that it is the intellect which makes a great scientist. They are wrong: it is character.

Paper is to write things down that we need to remember. Our brains are used to think.

At the same time, as social beings, we are moved in the relations with our fellow beings by such feelings as sympathy, pride, hate, need for power, pity, and so on.

In the matter of physics, the first lessons should contain nothing but what is experimental and interesting to see. A pretty experiment is in itself often more valuable than twenty formulae extracted from our minds.

I shall never believe that God plays dice with the world.

The attempt to combine wisdom and power has only rarely been successful and then only for a short while.

Coincidences are God's way of staying anonymous.