Thus, in Chapter 3 of Zhuangzi, the author (also Zhuangzi) reaffirms that conventional knowledge (acquired from society and education) limits our ability to experience life.
This chapter presents various studies to illustrate how conventional knowledge is inadequate to fully experience life.
For instance, there is a story of an elderly man who repairs wheels. His ability to fix the spokes on wheels comes form intuitive knowledge with many years of practice, but he cannot really explain the method to his son. The ability cannot just be studied in a class, or even orally taught; it must be directly perceived.
Thus a skill is personal and cannot be communicated, but rather experienced. In the same way, the Dao can be directly perceived but not communicated through words.