What Dreams May Come in the book are derived from my wide range of reading." One of Matheson's influences was Harold W. Percival, an adherent of Theosophy, a belief system with a strong Eastern and Hindu influence. The story also shares the same theme of the ancient Greek myth Orpheus and Eurydice, in which the gifted musician makes a challenging journey to Hell to retrieve his wife. One character quotes from the writings of 18th century Christian mystic Emanuel Swedenborg. Matheson bases his descriptions of the death experience itself on studies by Elisabeth Kübler-Ross and Raymond Moody. When reading these accounts, Matheson found that
Hades (single) the gods that appear in Greek mythology. An official Instagram for the project was also created at that time. On April 10, 2016, VIXX released the opening trailer of "2016 CONCEPTION", and nine days later on April 19th released the first album in the trilogy, "Zelos" which is based upon the god of the same name. On August 1, 2016, VIXX revealed that the second album would be "Hades", which is based on the God Hades; who was the ancient Greek chthonic god of the underworld. On August 2, VIXX began releasing teasers for the album, On August 5, 2016,