When a being is trapped, it may be that he doesn't realize this himself. The agony he endures, kept alive while he just has to turn his head to find that the liberation he so yearns for is just within a few feet away. Instead he keeps tormenting others out of frustration with his own situation. He only sees the shadows on the wall, contributing to worsen of his case. If he is able to let go of his ego, he can find himself again. Ironically he's already been found and cared for, shown by the silver string gently tight around his body.