How did Confucius understand Zhouyi?

Confucius didn't learn Zhouyi at first. On one occasion, he inadvertently used the Book of Changes to divine his own destiny, which was regarded as a "volcanic trip". He used this divination to invite Shang Qu, who taught the Book of Changes.

Shang Qu said to him, "The slogan of the' brigade' hexagram says,' Xiao Heng is soft outside and rigid inside, which is beautiful.' It means that although there is light like the sun, it is still. You are engaged in this kind of divination, which shows that although you have the wisdom of a saint, you have no authoritative position and cannot practice it in the world. "

Confucius sighed: "Phoenix doesn't fly here, and the Yellow River has no dragon map. This is really destiny takes a hand! " Since then, Confucius has repeatedly studied Zhouyi.