A probe into the source of psychological changes;

The Book of Changes is the law of Yin and Yang, emphasizing the basis of Yin and Yang. Divination in the Book of Changes is divided into reason and number, image and emotion. However, fortune tellers have many shortcomings, which cannot be compensated by rational numbers, and need meditation to locate them.

Those who change their minds and cultivate their minds participate in the change of "Yuhuan" with the quietness of "self", list hexagrams with images, choose hexagrams with numbers, and respond with their hearts. Eight diagrams, combined into sixty-four hexagrams, have thousands of images. There are many mistakes in single images, which is the beginning of the Book of Changes.