In the ancient symbol of the Ouroboros — a serpent devouring its own tail — lies the concept of devouring oneself and turning oneself into a circulatory process. It represents the continuous loop of destroying itself in order to be reborn. It represents the integration and assimilation of the opposite, i.e., of the shadow. The Ouroboros slays itself and brings itself to life, fertilizes itself, and gives birth to itself.