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Quotation from A Treatise on Insanity by Philippe Pinel
“I was not a little surprized to find many maniacs who at no period gave evidence of any lesion of the understanding, but who were under the dominion of instinctive and ab- stract fury”
A Treatise on Insanity, Second Species of Mental Derangement, Mania Without Delirium, trans. D. D. Davis (1806)

Pinel distinguishes violent mania without intellectual delirium from forms of madness centered on false belief.
Citation: "I was not a little surprized to find many maniacs who at no period gave evidence of any lesion of the understanding, but who were under the dominion of instinctive and ab- stract fury" — Philippe Pinel, A Treatise on Insanity, Second Species of Mental Derangement, Mania Without Delirium, trans. D. D. Davis (1806). (id a-treatise-on-insanity-q1)
Portrait: Philippe Pinel (1745 - 1826), Anne-Louise Mérimée, Public domain.
