Kabbalah, often defined as a Jewish mystical tradition, actually encompasses "the spiritual heritage of all mankind," according to Rav P.S. Berg in The Essential Zohar. Berg, the dean of the Kabbalah Centre (whose members include celebrities such as Madonna and Mick Jagger), has concentrated a core of teachings from the central kabbalistic text, the Zohar, in a single volume that makes kabbalistic wisdom accessible to readers of all religious traditions...