Generally speaking, there are two learning methods for Lao Tzu. One is to learn various cultural knowledge through external senses, which is "learning". It is through this kind of unremitting learning that he became a famous scholar in the Spring and Autumn Period. One of the most knowledgeable people, even Confucius asked him for advice. Just because Laozi is a monk, we must not think that he does not learn external cultural knowledge. Secondly, Laozi not only learned various cultural knowledge of the real material world, he also learned the knowledge of another world through the method of internal observation. His method is called "for the Tao...". Lao Tzu said, "Always have no desire to observe its wonderful things, and always have desires to observe its wonders." It was through this Tao that he gained the unique insight of "knowing the world without leaving home, and seeing the way of heaven without peeking into the confines of the world." Lao Tzu advocates "teaching without words". He believes that "teaching without words has no benefits, and the world can hope to match them." This method of demonstrating with practical actions is much more effective than empty theories that only talk but do not do. I seek truth from facts and admit that I also have things I don’t know. He said, “Knowing does not know the best; That’s why I’m not sick.”