The Greek god associated with the harvest is Demeter. She embodies agriculture, fertility, and the changing seasons, particularly the life cycle of plants. Demeter's relationship with her daughter Persephone illustrates the profound connection between life and death, as Persephone's descent into the Underworld brings about winter, while her return heralds spring. This cyclical nature of her influence showcases the importance of harvests and sustenance in ancient Greek society. Celebrations such as the Eleusinian Mysteries further emphasized her significance, connecting themes of growth and rebirth in agricultural practices.