Ovid Book 10: A Love that Could Never Be

The story of Orpheus and Eurydice is possibly the ultimate love tragedy. When Eurydice is killed by a serpent's bite, Orpheus ventures into the underworld to speak with Pluto and Proserpina. During this conversation they agree to allow Eurydice to leave with Orpheus so long as he does not look back at her as they exit the underworld. Unfortunately, Orpheus looks back at his wife and causes the deal to be broken. She was then lost forever in the underworld and he is forced to never return. 

This tragic tale ends with Orpheus playing music that is so sad, that all of creation weeps for him. This includes gods and goddesses. For what seemed as a sure win plan to retrieve his loved one, Orpheus ultimately failed and proved a lesson to all that they must heed the word of a god and not give into the whiles of human temptation.