As my teacher said, Tao is true knowledge from practice.

Data expansion:

The expert who knows cattle is an idiom, which originated from Zhuangzi's health preserving master. Abide by the law, do things with ease and use them freely. This idiom is generally used as an object and attribute in sentences, and is often used with "You are comfortable".

After repeated practice, I have mastered the objective laws of things, and I am comfortable in doing things and using them freely. My understanding of cattle is that I know where to cut in because I am familiar with the mechanism of cattle.

Life is the same. If we can thoroughly understand and understand the truth of life and find out the laws, we can not only master the laws, but also be cautious and restrained, just like my master.

While knowing how to use the law, we should also practice it over and over again, just like my "Understanding a Thousand Cows", which is repeated constantly, and finally we will understand the truth of the matter.

This idiom reveals a method of keeping in good health. Zhuangzi used knives to describe people, cows to organize complex society, and knives to explain cows to describe people's social life. Zhuangzi believes that people should find ways to adapt to society and avoid all kinds of contradictions in real life, so as not to be hurt.

This idiom vividly shows that as long as people master objective laws and use them flexibly, they can be liberated from necessity and gain real freedom. We should also pay attention to mastering methods in repeated practice, rather than blindly repeating them.