Kabbalah (also spelled Kabbala) conveys the Jewish secret doctrine and mysticism, as well as the secret symbolism of numbers and letters that has been passed down orally for millennia. It involves the mediation between God and the sensory world, which forms spiritual forces that emanate from God. Many books aim to introduce us to Kabbalah—not just since Madonna revealed to the world that Kabbalah is her religious foundation. This work by Dr. Erich Bischoff provides a comprehensive and accessible introduction to the foundational knowledge in both theoretical and practical forms. Clearly structured and explained, it describes the fundamental principles based on the two books "Yetzirah" and "Zohar," making it very easy for us to experience and understand Kabbalah ourselves. The origins of Kabbalah date back about 5000 years.