"It is not possible that this unity of knowledge, feeling and choice which you call your own should have sprung into being from nothingness at a given moment not so long ago; rather this knowledge, fee…"

"The present quantum mechanics is not a theory in the sense of the old theories, but rather a collection of rules for the calculation of probabilities."

"The more deeply we penetrate into nature, the more we find that it is full of mysteries."

"We are living in an age of specialization. This is a dangerous trend."

"By the way, I never realized that to be nonbelieving, to be an atheist, was a thing to be proud of. It went without saying as it were."