The I Ching (Wae-Giles), or “Yì Jīng” (Pinyin); also called “Book of Changes” or “Classic of Changes” is one of the oldest of the Chinese classic texts. The book is a symbol system used to identify order in chance events. The text describes an ancient system of cosmology and philosophy that is intrinsic to ancient Chinese cultural beliefs. The cosmology centres on the ideas of the dynamic balance of opposites, the evolution of events as a process, and acceptance of the inevitability of change (see Philosophy, below). In Western cultures and modern East Asia, the I Ching is sometimes regarded as a system of divination. The classic consists of a series of symbols, rules for manipulating these symbols, poems, and commentary.