Yi I, also known as Yulgok, was a prominent Korean philosopher and scholar during the Joseon Dynasty. Born in 1536, he is best known for his contributions to Confucianism and his efforts to promote education and moral integrity in society. Yi I emphasized the importance of human nature and ethics, influencing later generations of Korean thinkers. In addition to his philosophical work, Yi I was a skilled politician and served in various government positions. He wrote several influential texts, including the "Korean Confucian Classics," which helped shape the intellectual landscape of Korea. His legacy continues to be celebrated in Korean culture today.