Neijing said, "Avenue is invisible, and heaven and earth are born; The avenue is ruthless, the sun and the moon run, the avenue is nameless, and everything is often mentioned. " The nature of Tao is natural; The power of Tao is infinite; The supreme of the Tao produces everything. ..... This tells us that the "Tao" that Taoism believes in is the origin of the universe and the ontology of the universe. As the origin and noumenon of the universe, "Tao" is, in the words of Tao Te Ching written by Taishang Laojun, "Tao can be Tao, not surprising; Famous, very famous. " (Chapter 1) "Tao", (although) can be expressed in language, (but) is not the eternal truth of "Tao"; The name of "Tao" (though) can also be named by words, but (but) it is not the eternal real name of "Tao". Because of this "Tao", she is invisible, silent and colorless, which makes people unable to perceive.
"Tao" still exists after the metaplasia of all things in the universe, because it is contained in all things and is the basis for the existence, movement and change of all things in the universe. After the day is enlightened, it will be clear; After getting the word, you will feel at ease; After the immortal gains the Tao, it will be supernatural; After the valley got the word, it was full; Everything will survive after it has attained the Tao. On the contrary, if the sky is clear and there is no way, I am afraid it will crack; Without "Tao" and peace, the land will collapse; If the gods don't get the "Tao" and have supernatural power, I'm afraid they will lose their function; If the valley is full and there is no way, I am afraid it will dry up; If everything lives without Tao, it will be extinct. [1] It can be seen that everything in the universe is inseparable from Tao. If you build the Tao, you will survive, but if you leave the Tao, you will die.