Harvey affirmed an archetypal idea, that the heart is not simple, not one, but is inherently divided against itself; its left and right chambers, though side by side, are most remote to each other, without communication.
Hillman argues that Harvey’s discovery of the cor duplex confirmed an archetypal truth—the heart’s innate duplicity—which shattered the naive unity of the coeur de lion and made reflexive, divided modern consciousness possible.
, The Thought of the Heart and the Soul of the World, 1992thesis