The Key of the Mysteries, According to Enoch is an 1861 occult work by the French occultist Eliphas Lévi (pseudonym of Alphonse Louis Constant). It serves as a philosophical exploration of magical science, the Qabalah, and religious mysteries, framing these topics as the "divine mathematics" or lost wisdom preserved by ancient figures such as Enoch and Hermes Trismegistus. The book is structured to explain how occult science unites faith with reason and serves as the "key" to understanding the universe.