Persephone, the daughter Demeter, the goddess of harvest, was abducted by Zeus' brother Hades, and in sadness and rage, Demeter caused a drought that threatened all people.  Being commanded by Zeus to release Persephone, Hades tricked Persephone into eating four pomegranate seeds, forcing her to return to the underworld for four months each year.  Demeter accepted this fact, and returned the world to normal, restoring the four seasons of earth.