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
Orpheus and Eurydice be with his love, he mocked the deities in an attempt to visit Hades, to get her back alive. As his love was not "true"—meaning that he was not willing to die for it—he was punished by the deities, first by giving him only the apparition of his former wife in the underworld and then by having him killed by en. Apollo gives his son Orpheus a lyre and teaches him how to play. Orpheus played with such perfection that even Apollo was surprised. It is said that nothing could resist his beautiful melodies, neither enemies nor beasts. Even trees