There is an old saying that what comes from Linda is weak.

The big ones are hidden in the city, and the small ones are hidden in the forest.

-Zhuangzi

Hiding in the mountains and trying to retreat is retreating; Seeking seclusion in downtown is a hidden heart. Zhuangzi believes that people who try to retire in the mountains are small hermits, while those who hide in downtown areas are big hermits. Zhuangzi means that the real "non-persistence" means that the mind is not persistent, not the body is not persistent. Even if I ran to the mountains, I still had bad feelings in my heart, and I was not really secluded at all. On the contrary, in a bustling city, the highest state is "clinging to nothingness" and "emerging from the mud without being stained".