"It is not surprising that our language should be incapable of describing the processes occurring within the atoms, for, as has been remarked, it was invented to describe the experiences of daily life,…"

"Can nature possibly be so absurd as it seemed to us in these atomic experiments?"

"We have to remember that what we observe is not nature in itself but nature exposed to our method of questioning."

"I was forced to find a new way of expressing the fundamental laws of nature, one which would not rely on the outdated concepts of classical physics."

"The path to the new physics was paved by the discovery of the quantum of action."