Dong-gang Kim, U-ong (1540-1603) who was born in Sung-ju, Kyungsang-bukdo, studied under the guidance of Namm-yung Jo, sik as well as Toe-gye Yi, whang. However, as he himself professed, his main influence was from Mam-myung, for he often attended his seminars for Chinese Classics from the age of 24 to 33, before he went into politics. He complied and wrote Nam-myung's Lessons and Anecdotes(言行錄), and Biography(行狀), which attested to his status as the foremost disciple of the Nam-myung school. Before attending Nam-myung's lectures, Kim, U-ong was well acquainted through his father with the study of Kyung(敬), the cultivation of self as the center of the universe, and also had the Confucianist principle of employing himself in politics(出處). He advanced these studies under Nam-myung's instruction. He received a bell called Sungsung-za(惺惺子), which Nam-myung had always carried with himself as a reminder of constant awakening, and established the discipline and the practice of the study of his own mind. All of these experiences became an important qualification in the field of politics, and he clearly showed this discipline in deciding when he should go into or out of a political world, accept or decline government services. His study of Kyong, which was consistent in his achievements, characteristically put an emphasis on the study that preserves the clarity of mind, and it was a succession to Nam-myung's study of mind. It also was a little different from the study of Kyung conducted by Toe-gye school, in that Toe-gye focused on the maintenance of reverent and cautious state of mind. Kim, U-ong read books in neo-Confucianism, such as The Reflections on Things at Hands(近思綠), as well as Ju-hi's Epistle Anthology(朱書節要) edited by Yi, whang. On the basis of his interpretation of neo-Confucianism, he developed his own unique perspective in seminars of Chinese classics at the royal palace, and won a reputation as one of the best scholars of the time. Especially, his theory on the right and the wrong(辨異端) differed from that of Nam-myung, and it showed that he was influenced rather by Toe-gye. In conclusion, U-ong Kim established his own philosophical perspective through harmoniously integrating both Nam-myung's view and Toe-gye's.

Ⅰ. 머리말 
 Ⅱ. 儒者로서의 出處 
 Ⅲ. 학문의 연원과 本領 
 Ⅳ. 결 론

• 李相夏