I believe there is no philosophical high-road in science, with epistemological signposts. No, we are in a jungle and find our way by trial and error, building our road behind us as we proceed.

Those who say that the study of science makes a man an atheist, must be rather silly people.

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.

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

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.

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.

I am now convinced that theoretical physics is actually philosophy.