"There is a fundamental error in separating the parts from the whole, the mistake of atomizing what should not be atomized. Unity and complementarity constitute reality."

"One cannot be a physicist without feeling that a religious element is present in the world."

"The more profound the knowledge, the more clear is the awareness of the limits of our knowledge."

"You spoke in a manner that could only give me the firm impression that under your leadership everything was being done in Germany to develop atomic weapons."

"The atoms or elementary particles themselves are not real; they form a world of potentialities or possibilities rather than one of things or facts."