How to understand the profound meaning of "cultivating in the world, its morality is universal" in Tao Te Ching?

Simply put, the meaning of these two sentences is self-cultivation, or harmony between man and nature. This person's personality and behavior are naturally revealed, suitable for the public, and will show the significance of respecting equal individuals, freedom and democracy.

This sentence can be used to describe the rule of a head of state, and can also be used to judge whether the monarch uses "virtue" to govern the country. For example, taking Song Zhenzong as an example is easy to understand, because his theory of governing the country is very consistent with this sentence.

During his stay in Korea, he had his own unique methods, and he did everything himself, big and small. The most famous is his policy of "Seven Policies for Civil and Military Affairs", which contains the idea of this sentence. Don't use violent riots to solve the problem. At work, don't use your authority to make things difficult for others, but deal with it in a peaceful and regular way. In life, you can't know people by their identity, and treat ordinary people and prominent people equally.

These practices of Song Zhenzong made the country rich and strong, and the people of Song Dynasty lived a stable life. If his "virtue" was not widely spread, there would be no heavy scenery and stability in the Song Dynasty.