49. Ko

Change means that water and fire extinguish one another. Two women live together, yet their wills do not accord: this is called Change. When the day has come, then there is trust, because change is made and then believed. Bright in culture and joyful, there is great success through correctness. When change is fitting, regret vanishes. Heaven and Earth change, and the four seasons are completed. Tang and Wu changed the mandate, complying with Heaven and answering the people. Great indeed is the time of Change.