The myth of Demeter, Persephone, and Hades explains the seasons and was connected to the Eleusinian Mysteries ritual. It describes how Hades abducted Persephone to be his wife, causing Demeter to search for her and eventually agree to a compromise where Persephone spends one-third of the year with Hades and two-thirds with Demeter. The myth provides insights into ancient Greek marriage customs, human mortality, and the gods' attitudes toward humans.