What did I say at the end?

The Book of Changes is all-encompassing, and it is the beginning of group classics. Professor Ceng Shiqiang said that it is a book to unlock the code of the universe, and the divination that people are interested in is only one of its functions, but I tell you, Confucius said that this is not enough. Real fortune tellers don't make money by telling fortune by the roadside. In fact, life is imprecise and can only be predicted. Because numerology is changeable, what changes cannot be calculated accurately. Just like the weather forecast, sometimes it is not allowed. In fact, it is not that the meteorological station is not accurate, but that there are many factors that change. Everything is changeable and consists of yin and yang, which is the basic idea of the Book of Changes. At that time, the meteorological observatory predicted rain the next day according to the cloud and wind direction, but with the change of time, the cloud and wind direction are likely to be different from the speculation at that time. Everything in the universe is related, which is also a basic idea of the Book of Changes, that is to say, it is a bit like the butterfly effect in our science, so changes in clouds and wind directions or other small factors may lead to drastic changes in the results, do you understand?