The I-Ching, also called the Book of Changes, is an ancient Chinese text built around 64 hexagrams, each representing a different life situation, principle, or stage of change. It's one of the oldest divination systems still in active use, with roots going back thousands of years in Chinese philosophy.

Beyond its use in divination, the I-Ching is also studied as a philosophical text in its own right, exploring themes of balance, change, and the natural cycles believed to govern both nature and human life.