Answer:
The quote "Cerberus dropped his three heads low, ceased snarling for a moment, and let him pass." from lies retelling of Orpheus and Eurydice shows how Orpheus used his music to accomplish a goal.
The fantasy of Orpheus and Eurydice - his practically fruitful endeavor to reestablish her to live - is integral to the music. It reveals to us what music can do (nostalgically remember the past) and what it can't (bring it back). The most vital melodic treatment.
The fantasy of Orpheus and Eurydice - his practically effective endeavor to reestablish her to live - is fundamental to music. It reveals to us what music can do (nostalgically remember the past) and what it can't (bring it back)