The word "Mistress" can mean one of two definitions. The first being the lesser used of the two, with it meaning "a woman in a position of authority" (Oxford Languages, 2023). This could be inferred as, regardless of any physical characteristic, his mistress will always hold his heart, for he doesn't need to see a goddess, as the center of his love exists here. The second brings with it more troubling implications, being "a woman having an extramarital sexual relationship, especially with a married man." (Oxford Languages, 2023). This could bring a new meaning to the previously bitter start to the poem, being more of longing from the speaker for his previous lover, comparing this simple mistress to the goddess that was his previous relationship.