Refer to two sentences in the Book of Changes: one is "Heaven is healthy, and gentlemen strive for self-improvement" (dry divination); One sentence is "the terrain is Kun, and the gentleman carries things with morality" (Kun Gua). During the Republic of China, when Liang Qichao was teaching in Tsinghua University, he gave a lecture on Gentlemen to students in Tsinghua at that time. In his speech, he hoped that all students in Tsinghua would inherit the traditional Chinese virtues, and quoted the words of "striving for self-improvement" and "cherishing morality" in the Book of Changes to inspire students in Tsinghua. From then on, Tsinghua people wrote the words "self-improvement, kindness and morality" into the school rules of Tsinghua, and later gradually evolved into the school motto of Tsinghua.

The two sentences "Heaven is powerful, and the gentleman strives for self-improvement" and "The terrain is rich, and the gentleman carries things with morality" mean that the movement of Heaven (that is, nature) is strong and healthy, and accordingly, the gentleman should behave like Heaven, striving for self-improvement, being resolute and decisive, and never stopping; The potential of the earth is thick and slippery, and the gentleman is tolerant. A gentleman should run like Tianyu, indomitable even if he is displaced; If you are a gentleman, the measurement of objects should be like the earth, and nothing can't be carried.

This may be the central argument.