Related:

• Even for the physicist the description in plain language will be a criterion of the degree of understanding that has been reached.
  -- Werner Karl Heisenberg (1901-1976) German physici...
• Every word or concept, clear as it may seem to be, has only a limited range of applicability.
  -- Werner Karl Heisenberg (1901-1976) German physici...
• What we observe is not nature itself, but nature exposed to our method of questioning.
  -- Werner Karl Heisenberg (1901-1976) German physici...
• An expert is someone who knows some of the worst mistakes that can be made in his subject and how to avoid them.
  -- Werner Karl Heisenberg (1901-1976) German physici...
• Since the measuring device has been constructed by the observer.
  ..we have to remember that what we observe is not nature in itself, but nature exposed to our method of questioning....
• Mature software: code old enough that for every bug fixed, one or more new bugs are created.
  -- Karl Lehenbaue...
• Heisenberg may have been right.
• Heisenberg may have been here.
• If Karl, instead of writing a lot about Capital, had made a lot of Capital, it would have been much better.
  -- Karl Marx's Mothe...