Heaven in the Book of Changes

It is a concept formed by the combination of the odd-even change of numbers and the yin-yang change of everything in the world in the book of changes. "Yi Cohesion": "Tianyi, Dier; Tian San, Di Si; Heaven five, earth six; Bati Tianqi; Tianjiu, Dishi. " Take five odd numbers such as one, three, five, seven and nine as "days", which symbolizes masculinity and reflects the prosperity of things; Take five even numbers, such as two, four, six, eight and ten, as the "base number", which symbolizes women's things and embodies the soft nature of things. Yi Zhuan believes that the intricate changes of these numbers are the reasons for the changes of all concrete things, and people can predict the good or bad of future events according to the changes of numbers. Therefore, Yi Zhuan said: "The number of days is five, and the number of places is five, and the five are consistent. Twenty has five days, thirty has thirty places, and fifty places in heaven and earth are five, which makes it become a ghost. " (Cohesion) It is believed that the sum of "heaven" is twenty-five, the sum of "earth" is thirty and the sum of heaven and earth is fifty-five. Its changes have covered all the truths in the world, thus establishing an idealistic system of "the way of heaven and earth". In addition, Dong Zhongshu, a Confucian in the Han Dynasty, started from the mysterious "God's will" and called people the epitome and replica of "heaven", saying: "The human body is made of heaven." "Heaven" is sometimes used in the sense of heaven. Such as "Xunzi Wang Zhi": "Two expensive husbands don't match, and two cheap husbands don't match. This is a matter of several days. " Liang Qixiong quoted the note of Guanzi Fafa: "Mathematical theory is also", that is, the changing law of heaven.