The Hellenistic Period saw the canonization of the Tanakh (Hebrew Bible), according to one theory, and the emergence of extra-Biblical sacred traditions. The earliest evidence of a Jewish mysticism tradition surrounds the book of Ezekiel, written during the Babylonian Exile. Virtually all known mystical texts, however, were written at the end of the Second Temple period. Some scholars think the esoteric traditions of the Kabbalah (Jewish mysticism), were influenced by Persian beliefs, Platonic philosophy and Gnosticism.