The article comes from the fourth chapter of the first volume of Su Wen in Huangdi Neijing, that is, the fourth chapter of Su Wenjin Kui Yan Zhen Pian. Neijing is a compilation of medical papers, which consists of five elements: center, argument, argument, argument and core. In the process of learning, we should closely focus on these five elements to choose. For example, the first volume contains four articles: 1. Ancient naive articles focused on longevity; 2 .. Four-qi-tune spirit, centering on the annual transportation; 3. On anger, focusing on Japanese games; 4. The speech of the synopsis of the golden chamber focuses on the movement of the five internal organs. Different from modern long articles, ancient articles expounded some contents in units of volumes. An article has only one center, and all articles are called companion articles. These four articles discuss the methods of preserving health and preventing diseases to prolong life. Although there is no word "doctor" in the four articles, it is actually the best policy for doctors. Carrier, law. Followers benefit endlessly, while violators do endless harm. How much income depends on self-cultivation, which is the way to gain. Tao, to preach, heartless ignore. Without virtue, virtue does not talk to virtue. Self-cultivation is the fundamental condition that affects others. The so-called preaching does not rely on easy preaching, but on the influence of seekers and preachers. Only a monk can influence others. Only those who sincerely seek the Tao can get the true story; Only people who come to ask can talk to them. Prosperity is like the water of Jing Quan, never satisfied, never exhausted, never taking or giving. Take more, take less, follow the wishes of the questioner, don't impose it on others, and don't talk nonsense. Therefore, the scripture says: "Concealing the heart is close to the essence, which means that the Tao will get the Tao unless it is taught by others or taught by others", and "the Taoist, the sage and the fool admire it". To study this article, it is advisable to combine four articles into one book at the same time. The Theory of Ancient Innocence is not only the general theory of Neijing, but also the general theory and companion of a volume of four articles. Learning Neijing is also to combine general theory with public theory. The meaning of the book is a long story. Read it carefully and think deeply.