자신이 차고 다니던 칼인 경의검에 "내명자경, 외단자의(안으로 밝히는 것은 경이요, 밖으로 결단하는 것이 의다)"라는 두 구절을 새겼다.
He carved two lines on his sword, Gyeongui, saying, "Internal vigilante, it is a wonder to reveal it inside, and it is right to make a decision outside the sword he was wearing.