Kabbalah is a knowledge of Divine Wisdom. This truth is the foundation stone upon which the regenerating and saving portion of every true religion is based. The Kabbalah transmits to us such knowledge as the adepts of those times chose to commit to writing.
The Kabbalah originated with the Essenes, and also with the initiated Talmudists, who arranged Kabbalistic schools that followed Akiba and Simon Ben Jochai, who consolidated it into a scientific system in the Books, Jetzirah and Zohar.
It must, therefore, be well understood that the Torah thus mentioned by the Talmud is not the written, but the Oral Law, or Kabbalah, transmitted by tradition from generation to generation, until collected by Simon Ben Jochai and preserved in the volume of the Zohar. The Talmud is the Oral Law and is, in itself, in some places of a Kabbalistic character as a symbolical vehicle of the Divine Kabbalah.
There were two traditions in the Occult Kabbalah, an exoteric tradition perpetuated and an esoteric tradition wherein the Kabbalah was transmitted. The exoteric tradition is permeated with Kabbalism.