For centuries theI Chinghas 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 theI Ching—concentration and insight, calmness and wisdom, and various levels of realization. Skillfully translated by Thomas Cleary, this work presents the complete text of theI Chingplus the only Buddhist interpretation of the oracle.Chih-hsu Ou-i (15991655) wrote commentaries on dozens of Buddhist texts and Chinese classics and was proficient in both esoteric and exoteric studies. His work influenced the development of modern Buddhism in China.US