This monograph discusses the Zohar, the most important book of the Kabbalah, as a late strata of the Midrashic literature. The author concentrates on the 'expanded' biblical stories in the Zohar and on its relationship to the ancient Talmudic Aggadah. The analytical and critical examination of these biblical themes reveals aspects of continuity and change in the history of the old Aggadic story and its way into the Zoharic corpus. The detailed description of this literary process also reveals the world of the authors of the Zohar, their spiritual distress, mystical orientations, and self-consciousness.