Yi Hwang (1501-1570)--best known by his literary name, T'oegye--is one of the most eminent thinkers in the history of East Asian philosophy and religion. His Chasongnok (Record of self-reflection) is a superb Korean Neo-Confucian text: an eloquent collection of twenty-two scholarly letters and four essays written to his close disciples and junior colleagues. These were carefully selected by T'oegye himself after self-reflecting (chasong) on his practice of personal cultivation. The Chasongnok continuously guided T'oegye and inspired others on the true Confucian way (including leading...