For centuries the "I Ching "has been used as a basic map of conscious development, containing the underlying principles of all religions, and highly prized by followers of Buddhism. Chih-hsu Ou-i uses the concepts of Tianti Buddhism to elucidate the "I Ching "--concentration and insight, calmness and wisdom, and various levels of realization. Skillfully translated by Thomas Cleary, this work presents the complete text of the "I Ching " plus the only Buddhist interpretation of the oracle.