In "Circe's Power," we watch Circe assert her power as a sorceress in the face of losing the man she loves. She constantly reminds him of her magical power and all that she is capable of doing to him – including forcing him to stay with her as a prisoner. Circe is not only powerful because of her ability to practice magic, but also because she is immortal. She is more powerful than death, and yet she still fights to convince Odysseus (and the reader) of her power.
Love strips Circe of power.