And anyone who thinks they can talk about quantum theory without feeling dizzy hasn't yet understood the first thing about it.
Niels BohrOur task is not to penetrate the essence of things, the meaning of which we do not know anyway, but rather to develop concepts which allow us to talk in a productive way about phenomena in nature
Niels BohrWhen 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 and establishing mental connections.
Niels Bohr