Quantum Physics: Niels Bohr
Quotes from Famous Physicist Niels Bohr on the Copenhagen Interpretation of Quantum Physics, Particle Wave Duality, Bohr Atomic Model explained by the Wave Structure of Matter

Niels Bohr (1885 - 1962)

Einstein, don't tell God what to do. (Niels Bohr in response to Einstein's 'God does not play dice)

Those who are not shocked when they first come across quantum theory cannot possibly have understood it. (Niels Bohr on Quantum Physics)

For a parallel to the lesson of atomic theory regarding the limited applicability of such customary idealisations, we must in fact turn to quite other branches of science, such as psychology, or even to that kind of epistemological problems with which already thinkers like BUDDHA and LAO TSU have been confronted, when trying to harmonize our position as spectators and actors in the great drama of existence.
(Niels Bohr, Speech on Quantum Theory: Celebrazione del Secondo Centenario della Nascita di Luigi Galvani, Bologna, Ottobre 1937)

When it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned with describing facts as with creating images.
It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we say about Nature. (Niels Bohr, 1885-1962, on Quantum Theory)

The great extension of our experience in recent years has brought brought light to the insufficiency of our simple mechanical conceptions and, as a consequence, has shaken the foundation on which the customary interpretation of observation was based. (Niels Bohr, Atomic Physics and the Description of Nature, 1934)

Isolated material particles are abstractions, their properties being definable and observable only through their interaction with other systems. (Niels Bohr, Atomic Physics and the Description of Nature, 1934)

I remember discussions with Bohr which went through many hours till very late at night an ended almost in despair; and when at the end of the discussion I went alone for a walk in the neighbouring park I repeated to myself again and again the question: Can nature possibly be so absurd as it seemed to us in these atomic experiments? (Heisenberg, Physics and Philosophy, 1963)

Niels Bohr brainwashed a whole generation of physicists into believing that the problem (of the interpretation of quantum theory) had been solved fifty years ago. (Murray Gell-Mann, Noble Prize acceptance speech, 1976)

Quotes Attributed to Niels Bohr

Every sentence I utter must be understood not as an affirmation, but as a question. (Niels Bohr)

How wonderful that we have met with a paradox. Now we have some hope of making progress. (Niels Bohr)

The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth. (Niels Bohr)

Never express yourself more clearly than you think. (Niels Bohr)

Prediction is very difficult, especially about the future. (Niels Bohr)

Your theory is crazy, but it's not crazy enough to be true. (Niels Bohr)

http://en.wikiquote.org/wiki/Niels_Bohr Quantum-Physics