Abstract:Yi T’oegye (李退溪 1501–1570) was an eminent Neo-Confucian thinker who established an influential school of philosophy and scholarship in Korea.1 T’oegye was also a great spiritual master, although he basically followed a Confucian lifestyle of public service, teaching disciples, and compiling volumes of work. We need to pay more attention to the spiritual depth of Korean Confucianism by...