 Kabbalistic scholar Aryeh Kaplan traces the origins of medieval Kabbalistic meditative methods to their inheritance from orally transmitted remnants of the Biblical Prophetic tradition, and reconstructs their terminology and speculated techniques.From the 5th century BCE, when the works of the Tanakh were edited and canonised and the secret knowledge encrypted within the various writings and scrolls ("Megilot"), esoteric knowledge became referred to as "Ma'aseh Merkavah" () and "Ma'aseh B'reshit" (), respectively "the act of the Chariot" and "the act of Creation".Merkabah mysticism alluded to the encrypted knowledge, and meditation methods within the book of the prophet Ezekiel describing his vision of the "Divine Chariot".