The Open Book presents the principles of the ancient scientific wisdom of authentic Kabbalah, along with explanations of its basic rules. Kabbalah is a practical method for transcending the limits of one's senses and acquiring a new sense that opens the gate to the Spiritual World, while still living in this world. Rav Laitman clearly explains what goes on behind the scenes in the development of one's soul and the step-by-step attainment of the Upper Worlds. For anyone who wants to understand why our lives develop the way they do, and what we should do to make them develop differently, Laitman sheds light on every stage in the corporal and spiritual life of one who wants to be exposed to this wondrous wisdom.