The belief that there is only one truth and that oneself is in possession of it seems to me the deepest root of all evil that is in the world.

His [Erwin Schrödinger's] private life seemed strange to bourgeois people like ourselves. But all this does not matter. He was a most lovable person, independent, amusing, temperamental, kind and generous, and he had a most perfect and efficient brain.

We need to make a world in which fewer children are born, and in which we take better care of them.

To present a scientific subject in an attractive and stimulating manner is an artistic task, similar to that of a novelist or even a dramatic writer. The same holds for writing textbooks.

It is odd to think that there is a word for something which, strictly speaking, does not exist, namely, "rest." We distinguish between living and dead matter; between moving bodies and bodies at rest. This is a primitive point of view. What seems dead, a stone or the proverbial "door-nail," say, is actually forever in motion. We have merely become accustomed to judge by outward appearances; by the deceptive impressions we get through our senses.

It is true that many scientists are not philosophically minded and have hitherto shown much skill and ingenuity but little wisdom.

The belief in a single truth is the root cause for all evil in the world.