through the figure of Persephone, the stately Queen of Hades, we glimpse the Gorgon. What we conceive philosophically as the element of not-being in Persephone’s nature appears, mythologically, as the hideous Gorgon’s head
Jung and Kerényi argue that Proserpina/Persephone carries within her archaic form the Gorgon’s monstrous negativity — the nocturnal aspect of being that the living instinctively flee — making her the mythological embodiment of the ‘not-being’ dimension of psychic life.
, Essays on a Science of Mythology: The Myth of the Divine Child and the Mysteries of Eleusis, 1949thesis