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

January 1, 1970

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Original Language: English

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Variants: Those who are not shocked when they first come across quantum mechanics cannot possibly have understood it. Those who are not shocked when they first come across quantum theory cannot possibly have understood it. Anyone who is not shocked by quantum theory has not understood a single word. If you think you can talk about quantum theory without feeling dizzy, you haven't understood the first thing about it.