Considered one of the earliest form of written Codex concerning Judaic Kabbalah (Mysticism), The ''Serfer Yetzirah'' may date back as far as the 2nd Century BC. Compiled by many ''Authors'', The Codex contains not only Kabbalic spells, but outlines The Judaic ''Creation Theory'', which differs slightly from The ''Books of Moses'' (known in Western Culture as The ''Old Testament''). The Yetzirah also details ''The Fallen'' (Demons). The Codex is seen as being the foundation for later Christian interpretations of the origins of Lucifer and Demonology.