《系辞》修养论的理论基础有三：一是天道下贯为人性，性善是人道德修养的动力；二是天人关系。《系辞》以阴阳变化来解释世界的运行，并认为天与人是相应的，人借助观察天地之运作而得到道德之启示，回过头来修养自己的身心；三是以趋吉避凶为基础，讨论道德修养。
The theoretical basis of the theory of cultivation in Xi-Ci is as follows: firstly, the Tao of heaven runs down to human nature, and goodness of nature is the motive force of human moral cultiva-tion; secondly, the relationship between human and nature. In Xi-Ci, the changing of Yin and Yang was used to explain the movement of the world and believed that heaven and human were cor-responding. By observing the operation of heaven and earth, human got moral enlightenment and cultivated his own body and mind. Thirdly, the moral cultivation is to be based on pursuing good fortune and avoiding disaster.
