Huainantzu is an important anthology of theses written by Quin Han Taoists. Cultivation of life is essential to politics. The major purpose of cultivation is to obtain the perfect management of a great empire. All things on earth are formed by energy (chi) but human beings possess essential energy (jingchi). Huainantzu believe that the spirit (shen) affects our body in particular. This spirit (shen) can manifest itself as energy (chi), which can invigorate our body. On the other hand, the body can also produce nergy (chi), which can become a spirit (shen), as well.