"The T'oegye Research Institute, Kyungpook National University"

“To become a sage", translation of Ten Diagrams on Sage Learning, Michael C. Kalton, Columbia University Press,”

“Cyber Dosan Seowon, general information on Yi Hwang and his teachings”

“The T'oegye Studies Institute, Busan”

“...he Confucian way of learning is that in order to ascend to lofty heights one must begin with the lowly, to travel afar one must begin with what is near. Indeed, to begin from the lowly and near certainly is a slow process. But apart from it, whence comes the lofty and distant? In applying one’s efforts to gradual advancement one attain what is lofty and distant without parting from what is lowly and near; it is in this that it is different from Buddhist and Daoist learning.”

“Secrets of Reality – Yi Hwang's major work with diagrams”