Greek underworld his duty was to bring these souls to the underworld and no one would persuade him to do otherwise. Cerberus (Kerberos), or the "Hell-Hound", is Hades' massive multi-headed (usually three-headed) dog with some descriptions stating that it also has a snake-headed tail and snake heads on its back and as its mane. Born from Echidna and Typhon, Cerberus guards the gate that serves as the entrance of the underworld. Cerberus' duty is to prevent dead people from leaving the underworld. Heracles once borrowed Cerberus as the final part of the Labours of Heracles. Orpheus once soothed it to sleep with
Hell Is the Absence of God experiences. Commenting on "Hell Is the Absence of God" in the "Story Notes" section of "Stories of Your Life and Others", Chiang said that after seeing the film "The Prophecy", he wanted to write a story about angels, but could not think of a scenario that would work. It was only when he started imagining angels as being "phenomena of terrifying power, whose visitations resembled natural disasters" that he was able to proceed. Chiang wrote that the Book of Job also contributed to ideas for his story, as it raised the question: why did God restore Job to prosperity when