It can be used to understand the universe and nature as well as the human body. All things carry the Yin and the Yang, deriving their vital harmony from the proper blending of the two vital forces. Tao is the cause of change and the source of all nature, including humanity. Everything from quanta to solar systems consists of two primary elements of existence, Yin and Yang forces, which represent all opposites. These two forces are complementary elements in any system and result in the harmony or balance of the system.
All systems coexist in an interdependent network.
This is the natural order. Tao and virtue are said to be the same coin with different sides. The very title Tao Te Ching means the canon of Tao and Virtue. The path of the Return to the Tao is the process of transforming Later Heaven into Earlier Heaven. In other words, it is the process of a reunification with Tao, of being transformed from a conflicting mode to a harmonious mode.