What does "The man who has reached heaven since ancient times is the foundation of life" mean?

From the "Huangdi Neijing", the original text is: Huangdi said: Since ancient times, the foundation of life is based on yin and yang. Between heaven and earth, within Liuhe, its Qi nine states, nine orifices, five Tibetan areas, and twelve nodes all lead to the weather. Its birth is five, its Qi is three. If you do this several times, the evil energy will hurt people, which is the foundation of life.

The meaning is: Huangdi said: Since ancient times, the connection with the weather has been the foundation of life, and this is nothing more than the yin and yang of the sky. Between heaven and earth, within Liuhe, it is as big as the territory of the Nine Provinces, and as small as the nine orifices, five internal organs, and twelve joints of a human being, all connected with the weather. The weather is derived from the five elements, and the yin and yang qi are divided into three parts according to the growth and decline of the cricket. If the changing laws of yin, yang and five elements are often violated, evil spirits will harm the human body. Therefore, adapting to this law is the basis for longevity.