New Looks At Old Myths

Demeter's hair was yellow as the ripe corn of which she was mistress, for she was the Harvest Spirit, goddess of farmed fields and growing grain. The threshing floor was her sacred space. Women, the world's first farmers (while men still ran off to the bloody howling of hunt and battle), were her natural worshipers, praying...

Demeter had but one daughter, and she needed no other, for Persephone was the Spirit of Spring. The Lord of Shadows and Death, Hades himself, the Unseen One, carried her off in his jet-black chariot, driven by coal-black steeds, through a crevice in the surface of Earth, down the the realms of the dead...

With Zeus' help, the mother retrieved her daughter, but Persephone had already eaten a pomegranate seed, food of the dead, at Hades' insistence, which meant that she must come back to him. In the end, a sort of truce was arranged. Persephone could return to her sorrowing mother but must spend a third of each year with her dark Lord. Thus, by the four-month death each year of the goddess of springtime in her descent to the underworld, did winter enter the world. And when she returns from the dark realms she always strikes earthly beings with awe and smells somewhat of the grave.

— intro. "The Way They Came"

from Sailing The Wine-Dark Sea: Why The Greeks Matter by Thomas Cahill