The text is excerpted from Master of Health, the main purpose of which is to clarify the spirit, protect the master who nourishes life, and suggest that the way of health is to conform to nature. In the excerpt part, the story of "being an expert knows how to solve a cow" is used to describe the complexity of society as the bones and muscles of a cow. When dealing with the world, we should "abide by heaven", "take reason as heaven" and adopt a cautious and caring attitude of "fearing nature as a warning". We should also take Tibet ("hide the knife") as our own way to achieve it. " Today, when we study this article, we should realize that we can't do anything subjectively. We should gradually master the internal laws of things through repeated practice, and then follow the objective laws to deal with complex social affairs. Only in this way can we be invincible forever. It is said that life is complicated, so there are many works on the market to guide how to live scientifically and artistically, but in fact, the instructors still feel complicated after reading it, because the cases of life have changed too much. Some people think life is simple, but they think life is complicated because they want it. As long as they are not complicated, there is not so much burden in their minds. As long as it is not complicated, others generally disdain to wrestle with simple people. But this almost soon proved to be a fable, because the present society itself is not a simple society. Think about how to become an expert. Cows are undoubtedly very complicated. How can we understand a cow? Why can I go down with a knife and put it in place easily and simply? What is the reason? Because we have mastered its mechanism. Cattle and cattle are different, of course, but the mechanism is the same regardless of China cattle and American cattle; Everyone's life also has its own characteristics, and the basic principles are similar. Because I am familiar with the mechanism of cattle, I naturally know where to operate. So is life. If we can thoroughly understand and understand the truth of life and find out the rules, we can achieve the goal of having cows but not cows, just like my skilled workers, and we can simplify the complex and really relax. The moral of this passage is this: Zhuangzi believes that human life is limited and knowledge is infinite. It is a dangerous thing if we pursue infinite knowledge with limited life. (But at the same time, it should be pointed out that Zhuangzi himself is an extreme relativist, that is to say, in his thoughts, beauty is ugliness, and ugliness is beauty. So his thoughts can't be completely used as a reference for real life)