부산대학교 도서관

This article examines a thesis by Namdang, a Confucian scholar in Chosŏn Korea, on the natures of humans and non-human living beings, using Zhu Xi’s li (理) - qi (氣) theory. Regarding the sameness or difference between li and qi, Zhu Xi formulated different opinions in his early and later life and was also at times inconsistent in his works of a certain period. To a certain extent, Zhu Xi’s thoughts lacked coherence, which led to subsequent debates. In seeking to develop Zhu Xi’s li-qi theory, Namdang put forward his original thesis of Trichotomous Nature, which significantly enriched Zhu Xi’s ideas. The “nature transcending the appearance of things” (K. ch’ohyŏnggi 超形氣) refers to a pure xing (K. sŏng 性; nature), concerned with only li without considering the influence of qi from the perspective of a unitary source (K. irwŏn 一原; one source). At this stage, everything shares the same li and xing. The “nature originated from temperament” (K. in’gijil 因氣質) demonstrates the shared nature for the same species as well as the difference in nature across species, thus being an endowmentdependent li. At this stage, for the same species, they share the same li, qi, and xing, while for varying species, there is a difference in li, qi, and xing. The “nature mixed with temperament” (K. chapkijil 雜氣質) considers the xing of pure qizhi (K. kijil 氣質; physical temperament) in which all creatures differ. It is thus a concept that demonstrates the particularity in all things, with varying differences in li, qi, and xing.