Freud was among the earliest psychoanalysts to connect a psychiatric diagnosis to Narcissus of Greek mythology, the son of the river god who fell in love with his own image in a pool of water and, not realizing that it was he who was “spurning” his affection, died in despair. “Narcissus could not conceive that he was in love with his own reflection,” wrote the psychologist Elsa Ronningstam. “He was caught in an illusion.”