Teacher, is it necessary to preach and teach?

Central argument: a scholar must have a teacher (or "the Tao is there, and the teacher is there"). The argumentation method adopted in this paper is: (1) comparative argumentation. For example, the ancient sage-the present man loves his son-is a witch doctor musician and a family of literati. Through comparison, a strong contrast effect is created, which proves more strongly that "the teacher's way has not been passed on for a long time!" It is also difficult to want people who are not confused. "(2) Case study. Such as: "Confucius studied under Tanzi, Changhong, Shi Xiang and Lao Dan. Scorpions' disciples are not as clever as Confucius. "Facts speak louder than words, and typical cases prove that the view of' saints are impermanent' is more convincing. (3) reference. Such as: "Confucius said: there are three people, there must be my teacher." "Using Confucius' famous words to prove your point of view has enhanced your persuasiveness.