Toegye Yi Hwang (1501-1570) was a prominent Korean Confucian scholar and philosopher. He is best known for his contributions to the development of Confucian thought in Korea, particularly through his interpretation of the teachings of Confucius and Mencius. Yi Hwang emphasized the importance of moral cultivation and the role of education in achieving a virtuous life. Yi Hwang founded the Toegye School, which became a significant center for Confucian learning in Korea. His works, including the "Ten Diagrams on Sage Learning," have had a lasting impact on Korean philosophy and education. Today, he is celebrated as one of Korea's greatest intellectual figures.