Yijing

Ancient Chinese text, one of the Five Classics of Confucianism. The main body of the work, traditionally attributed to Wenwang, contains a discussion of the divinatory system used by wizards in the Zhou dynasty. A supplementary section of “commentaries,” believed to date from the Warring States period (475–221 BC), is a philosophical exposition that attempts to explain the world and its ethical principles. The book's cosmology, which involves humans and nature in a single system, has made it universally popular.