Werner Heisenberg — "The problems of atomic physics are not problems of technology, but problems of p…"

"Natural science does not simply describe and explain nature; it is part of the interplay between nature and ourselves."

"The history of physics is not only a sequence of experimental discoveries and observations, but also a history of concepts."

"The concept of the objective reality of the elementary particles has thus evaporated not into the fog of some new, unclear, or not yet understood reality concept, but into the transparent clarity of a…"

"The path to the nucleus is easy to find, but the nucleus itself is hard to reach."

"I was forced to find a new way of expressing the fundamental laws of nature, one which would not rely on the outdated concepts of classical physics."