Surely one of the most vivid and memorable metaphors in psychology is Carl Jung’s shadow. Similar in many ways to Freud’s “Id,” the term shadow helps us to visualize the way in which troublesome human instincts and impulses may be consigned to darkness within the psyche. I picture a troop of chimpanzees, caged up in the dark, getting more and more enraged, waiting for a chance to kill their jailer and launch themselves at the world.