Niels Bohr - Theory Quotes

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But, but, but...if anybody says he can think about quantum theory without getting giddy it merely shows that he hasn't understood the first thing about it!

Niels Bohr
For a parallel to the lesson of atomic theory regarding the limited applicability of such customary idealizations, 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 Tzu have been confronted, when trying to harmonize our position as spectators and actors in the great drama of existence.

Niels Bohr
The present state of atomic theory is characterized by the fact that we not only believe the existence of atoms to be proved beyond a doubt, but also we even believe that we have an intimate knowledge of the constituents of the individual atoms.

Niels Bohr
The very nature of the quantum theory... forces us to regard the space-time coordination and the claim of causality, the union of which characterizes the classical theories, as complementary but exclusive features of the description, symbolizing the idealization of observation and description, respectively.

Niels Bohr
Anyone who is not shocked by the quantum theory has not understood it.

Niels Bohr
Your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct.

Niels Bohr