Today's medical students are all very bored, and they only use this profession as a means of food and clothing. Who knows that medicine is the way? This is why the ancient sages revealed the secrets of heaven and earth, seized the power of creation, and saved people from death. Their principles are so exquisite that they cannot be learned by people who are not smart and wise; Huangdi , The books written by Shen Nong, Yue Ren, and Zhong Jing are ancient and profound in terms of writing, covering a vast area, and cannot be studied except by those who are profound and knowledgeable; Transmission and change of illness occur in an instant, and it is difficult to distinguish between true and false for a while. If one is stubborn and stagnant, life and death will be determined. It cannot be learned by those who are not open-minded and flexible. There are thousands of disease names and tens of thousands of symptoms. Meridian and collateral zang-fuorgan, for internal administration and external treatment, the book of prescriptions and medicines cannot be fully explained after several years, and it cannot be learned by those who are not diligent in learning and good at memorizing. After Neijing, the branches were divided into sects, and people were their own teachers. They were not without partiality and refutation, but also had weird and despicable theories, which were misunderstood and misunderstood. , You will never return to it, and you cannot learn it unless you are a person who knows it carefully and accurately. Therefore, those who follow this path must have extraordinary talents and understanding, and be able to put aside worldly things and concentrate on it for several years. Only then can they gain a tacit understanding of the minds of the ancient saints and be taught by a teacher. Today's medical students, like the previous ones, practice antagonism in everything. The things that a person who has mastered Confucianism can't do for the whole world are those who are completely devoid of liberal arts and want to do it in a short time. The reason why Taoism is lost every day is that it is in vain that the dead are everywhere in the world.