*Gustav Klimt, Medicine (Hygeia) (1899-1907)* Whenever they feel the need of summoning spirits to unravel the knots that have long entangled their very basic sense of reasoning, they will build a fire on the ground. A clairvoyant will mutter a string of rambling spells, and all participants are made to bow their heads in reverence. Nothing happens much after the spirit appears. Some remarks tentatively that the fire always hisses and flickers whenever the ghost slides pass. But most of them insist they witness nothing during the course of the ritual; anything abnormal that any of them happen to catch a glimpse of is dismissed imperiously as the result of their fantasies. Only the clairvoyant is endowed with the gift of seeing and communicating with the spiri...