" kinship libido.”8 That is to say, the original state of participation mystique in the uroboros expresses itself as the force of inertia that keeps man fixed in the oldest and most intimate of family ties. These family ties are personalistically projected to mother and sister; and the symbolic incest with them, straining back to the uroboros, is therefore marked by a ‘lower femininity” which binds the individual and his ego to the unconscious. "

― Erich Neumann , The Origins and History of Consciousness