1. Ancient scholars must have teachers. Teacher, so preach and teach to solve doubts.
2. Nothing is expensive, nothing is cheap, nothing is long, nothing is short, the Tao exists, and the teacher exists.
The teacher's instruction has been handed down for a long time, and it is hard to be confused by others.
4. A saint is an impermanent teacher.
5. 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.