What does Confucius mean by reading Yi? All parts bow down and beg.

When Confucius read the Book of Changes, he couldn't help sighing when he read two hexagrams of gains and losses. When Xia Zi heard this, he asked Confucius, "Sir, why are you sighing?" Confucius said, "loss is a bad thing. On the surface, it is not good, but when you think about it, there are many benefits hidden behind it." "Benefit" is a good thing. This kind of good thing is good on the surface, but when you think about it carefully, there are great hidden dangers behind it. So I am deeply impressed by this phenomenon. "Xia Zi then asked:" So people who really study can't say it is beneficial? Confucius replied, "No, bad methods are better for talents. This is the truth." If Tao is better, it will do harm to people's body and mind. If you do more harm to yourself, then this person will be more humble, and he will humbly accept the knowledge of others, so this benefit can last for a long time. "