Yi Hwang's Letter

Who could possible know a person better than his or her parents? We will read the letters of the great men from Chosun, who were "fathers" before they were scholars, officers and writers. What kind of letter did Lee Hwang (Toegye, 1501-1570), scholar and civil servant from the mid-Chosun era, send to his son who had lost confidence and have given up the state exam? Let's listen to the voice of the father from the letter.