Sometimes the child in one behaves a certain way and the rest of oneself follows behind, slowly shaking its head.
Niels BohrAn independant reality in the ordinary physical sense can neither be ascribed to the phenomenon nor to the agencies of observation.
Niels BohrYou must come to Copenhagen to work with us. We like people who can actually perform thought experiments!
Niels BohrIf you think you understand it, that only shows that you don't know the first thing about it.
Niels BohrThe 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