Uam, Song Siyeol(尤庵 宋時烈, 1607-1689) is a Confucian scholar and the leader of Noron(老論) who represents the 17th century. He used to write large letters to his juniors and disciples. This work is written in 16 large letters written by Song Siyeol. This work was written by Song Siyeol as 16 large letters and gave to Kwon(權後重), the local town of Andong. 君子存心 當如靑天白日 人得而見之也. The mindset of Gentlemen must be like the bright sun of the blue sky, and people can see it.