From Han Yu's Shi Shuo: "There are priorities in learning the Tao, and there are specializations in the technical field."
Interpretation of Vernacular Language: The truth you hear comes first, and then comes. Skill learning has its own research direction.
It can also be said that people can't judge the level of knowledge by age. As long as this person has knowledge that you don't have, then he can be your teacher.
Extended data
Original: saints are impermanent teachers. Confucius studied under Tan Zi, Changhong, Shi Xiang and Lao Dan. Scorpions' disciples are not as clever as Confucius. Confucius said: If there are three people, there must be a teacher. So disciples don't have to be inferior to teachers, and teachers don't have to be superior to disciples. They have a good understanding of Taoism and specialize in their skills. That's all.
Translation:
A saint has no fixed teacher. Confucius studied under Zanzi, Changhong, Shi Xiang and Lao Dan. These people are not as talented as Confucius. Confucius said: If several people walk together, there must be one who can be my teacher. "So, students are not necessarily inferior to teachers, and teachers are not necessarily more talented than students. They have heard about it early and heard about it late, and their knowledge and skills have their own specialties. That's all.
Explain the truth of learning from teachers, satirize the world where teachers are ashamed, educate young people, and play a role in changing the atmosphere. This paper lists positive and negative examples, compares and demonstrates repeatedly, discusses the necessity and principle of learning from teachers, criticizes the bad habit of "being ashamed to learn from teachers" in society at that time, shows extraordinary courage and fighting spirit, and also shows the spirit of expressing opinions independently regardless of the secular. Although the full text is not long, it has profound implications, distinct arguments, rigorous structure, thorough reasoning and strong persuasiveness and appeal.