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A physician who treated me as a nervous case for a while said in the end "No! It is not a matter of your nerves; it is I who am nervous".

Friedrich Nietzsche (1977). “The Portable Nietzsche”, p.396, Penguin
A physician who treated me as a nervous case for a while said in the end No! It is not a matter of your nerves; it is I who am nervous.