The five elements

Chinese philosophical model is the theory of the five elements. This theory states that all things in the cosmos are formed of the five elements of metal, wood, water, fire, and earth, all of which interact with each other.

Since the human body in the gigantic universe was itself viewed as a “small universe,” these philosophical models were also applied to human beings. According to Chinese medical theory, all our bodily functions are controlled and maintained through a kind of vital energy called “qi.” This qi does not flow through our bodies aimlessly, but courses along certain channels—the so-called “meridians.” The forces of yin and yang also have an effect in the established energy flow.