Werner Heisenberg — "The reality we can put into words is never reality itself."

"The positivists have a simple solution: the world must be divided into that which we can say clearly and the rest, which we had better pass over in silence. But can anyone conceive of a more pointless…"

"Every word or concept, clear as it may seem to be, has only a limited range of applicability."

"I am firmly convinced that we must never judge political movements by their aims, no matter how loudly proclaimed or how sincerely upheld, but only by the means they use to realize these aims."

"The world of atoms is a world of possibilities and not a world of things."

"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…"