Dao De Jing is about how the consciousness can be aware of itself and reach the state of wu wei or naturalness. Naturalness is a state similar to enlightenment in Zen Buddhism and realization in Confucianism. It is about how nature works, and man is part of nature. It does not talk about heaven and hell, gods and spirits; it is a science parallel to modern astrophysics. It is a book about how a ruler should govern a country; it is also about how an individual's mind should be.