Good students hear about Dao and work hard, but they follow it. Average students hear about Dao and sometimes stick with it, sometimes get lost. Bad students hear about Dao and laugh at it.
If it wasn't hilarious, it wouldn't be worth thinking of as Dao, so these are some of the jokes it plays.
Observing Dao obscures it, proving Dao refutes it, sorting Dao scatters it. Praising De degrades it and preaching defiles it. Developing De depletes it, supporting De demeans it and believing denies it.
A school with no lessons, a method too subtle to learn, a lecture too faint to hear, a metaphor with no meaning, Dao is a riddle with no answer, and Dao is only as convincing as it is a good sport.