In the 'Pandora's box', Haphaestus asks the goddesses to give Pandora a gift or a power. In other words he told them to give Pandora some of their powers.
It is possible that Hurston chose to tell the story within a framework to give Janie a voice in the novel. Had Hurston relied solely on a third person narrative, Janie would have had no voice. Using first person narrative in this framework proves that Janie has gained strength and independence as a result of her lifelong search for true love.