On the inevitability of the enlightenment of virtue field by the transcendenceof the concept of spirit over Yin-yang in Yi Zhuan

From the divine function of the Book of Changes, this paper believes the concept of Yin-yang conveys a confined meaning, which makes all the objects conceived in it non-being-in-itself, with the concept of spirit as an exception, however. Spirit is an objective being-in-itself; meanwhile it also has a subjective meaning. The transformation from spirit as an objective being-in-itself to that as a subject must be realized through moral practice; while what makes moral practice possible is the guarantee of spirit. Such a bidirectional process is also the enlightening process of virtue with the unity of the theory of Ontology and that of self-cultivation in Yi Zhuan.