天行健 君子以自彊不息
하늘의 움직임은 굳세니, 군자는 스스로 굳세어 쉬지 않는다
Heaven moves with vigor; the noble person strives unceasingly
— I Ching, Qian Hexagram
From the Tuan commentary of Qian, the first hexagram. "Strive unceasingly" — Tsinghua and Korea University both took their mottos from this line. Self-cultivation is not rest but flow.
