How to use the Book of Changes to calculate hexagrams?

The so-called "fortune-telling" of the Eight Diagrams in the Book of Changes is mainly based on the eight or sixty-four hexagrams in the Book of Changes and the five elements of heavenly stems and earthly branches and Ke Sheng to measure what has happened and may happen, such as: weather, seeking official positions, geomantic omen, marriage, catching thieves, getting lost, traveling, trading, looking for someone, seeing expensive people, farming, seeking money, looking for a job and getting sick. Why is this? The reason is that there is a philosophical principle behind the eight diagrams fortune-telling in the Book of Changes: accidents are interrelated, or there is some inevitable connection between two accidents.

What China people are most familiar with is the classic summary of inevitability and contingency by Marxist philosophical principles: the relationship between inevitability and contingency is unity of opposites. First of all, inevitability and contingency are two different trends in the development of things, and their causes and status and role in the development of things are different. Secondly, inevitability and contingency are unified, which are mainly manifested in the following aspects: first, inevitability is always manifested through a large number of accidental phenomena, thus opening up a path for itself, and there is no pure inevitability out of contingency. The second kind of contingency is the manifestation and necessary supplement of inevitability, which is hidden behind and restricted by inevitability, and there is no pure contingency that is divorced from inevitability. Third, inevitability and contingency can be transformed into each other under certain conditions.

It's really obscure, but it's actually very simple. For example, the combination of an egg and one of thousands of sperm is an extremely accidental event. However, this accidental event is bound to be related to the accidental meeting of a man and a woman many years ago. Without the accident in front, there can be no accident behind. Therefore, accidents and accidents are related.

The process of using the Book of Changes to calculate hexagrams is generally to determine a pre-calculation, such as what is lost, to see which direction you can find it. Then shake your mind. There are many ways to shake divination. The most common is to use three long copper coins and shake them six times. According to the yin and yang corresponding to the front and back of copper coins, the hexagrams are obtained, that is, one of the 64 hexagrams. It was an accident to lose something, and it was an accident to shake out a divination. However, these two accidents that happened to one person in succession are related.

The greatness and mystery of the Book of Changes left by our ancestors to the Chinese nation lies in the fact that through the analysis of the latter accidental event, we can infer the situation of the previous accidental event that is inevitably related to it. Just as the Book of Changes is an extremely complex function, an unknown equation can be obtained by inputting a variable, and an approximate solution can be obtained by analyzing the equation. As for the accuracy of the solution, of course, it depends on the level of the person who solves the equation. However, whether this "solution" can be correctly expressed or not, this "solution" has been expressed in the obtained divinatory images.

Can you understand it or not? Different people have different opinions.