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The theory of I-ching is universal and able to be applied in any place in the world, up to the grace of sky, stars and the moon, down to the principle of the land, mountains and rivers, because it contains the rules of changing of days and nights, brightness and darkness. It traces back to the ultimate of everything, for it knows the principle of the circling life and death. Spirits combines and creates everything in the world, so it is the source of life. It goes and changes with life and death, in which way we can see the figures of the Gods and the ghosts. The theory of I-ching goes with the ultimate principle of the world, for the two is similar. It enables us to know the whole creation, and gives us the theory to rectify the wrong and manage the world, so it has no limit in application. The theory is universally applicable even without a mistake, so the ones who know it well are happy to take actions according to the principle of the world, and take it for granted without confusion and worry. To stay in a situation of safety and do according to the good standard of the principle, it enables a man to have a general love to the whole world. The theory includes all changes in the world with the most meticulous details, which make it possible that it is perfect without a mistake or a flaw. It enlightens us of the principle of darkness and brightness, Yin and Yang, with the most universal principle in it. Similar to the fact that we don’t know all about the mystery and almighty of the God, neither, we don’t have a universal idea about the all-round principle of I-ching that unveils the whole university.