Abstract

Jeong Jae-gyu (鄭載圭, 1843-1911) was a scholar in the late Joseon Dynasty who contributed to the solidification and formation of the Nosa school (蘆沙學派) through the publication of Nosajib (蘆沙集) and active lecture activities based on the independent acceptance of his teacher, Ki Jeong-jin (奇正鎭). He explained the concept of intelligence based on the definitions of Shen Gui-bao (沈貴珤), an early scholar of the Yuan Dynasty, and even though the volume was not large, he presented a deep analysis and a unique interpretation. Few Joseon Neo-Confucian scholars had explained the concept of intelligence based on Shen Gui-bao, so his attempts are unique. Shen Gui-bao explained, “the Intelligence includes the axis of change in the real world where the heavenly principles are inherent and has a mirror to judge the conflicts of human affairs”. Hu Bing-wen (胡炳文) used the explanation to justify his concept of intelligence. However, since intelligence is a principle, and the “axis of change in the real world” is also a principle, an unreasonable proposition of ‘principle includes principle’ can be established according to Shen Gui-bao’s definitions. Therefore, Kim Chang-hyeop (金昌協) and others criticized Shen Gui-bao, saying that such a proposition cannot be accepted. However, in the 19th century, Lee Hang-ro (李恒老) and Lee Jin-sang (李震相) showed a positive attitude toward Shen Gui-bao’s definitions. Jeong Jae-gyu, who partially accepted the influence of Lee Jin-sang, reaffirmed the fundamental position of intelligence through the phrase “Intelligence includes the axis of change in the real world”, and emphasized that intelligence is the basis for both moral judgment and the principle of perception. Furthermore, in the Neo-Confucian system, intelligence corresponds to a quiet virtue, so Jung Jae-gyu’s emphasis on it might lead to a theory of cultivation centered on solitude (靜), which can be confirmed in questions and answers shared with Ki Jung-jin, his writings, and poems.