"Tao Te Ching" Chapter 56 He who knows does not speak.

Those who know the original text don't speak, and those who speak don't know. Plug the switch and close the door; Defeat its sharpness, solve its dispute, its light, bring its dust, which is called metaphysics. Therefore, if you can't get it, you can't get it; If you can't get it, you can't get it, and it hurts; It's expensive if you can't buy it, and it's cheap if you can't buy it. Therefore, you are the world.

A true wise man will not impose laws on the people, and those who impose laws are not true wise men. Block the hole of lust and close the heart of desire; Never show your edge, remove secular interference, gather their brilliance and blend in with their secular world. This is the domain of the mysterious temple. People who reach the realm of "Xuan Tong" are not far away; Regardless of interests, regardless of harm; Neither expensive nor cheap. So it is respected by all people in the world.