1. The sky does not change its usual state, the earth does not change its rules, spring, summer, autumn and winter do not change its seasons, which is the same in ancient and modern times.

——"Guanzi·Situation"

2. Everything is reasonable. If you follow it, it will be easy, but if you go against it, it will be difficult.

——[Song Dynasty] Cheng Hao's "Quotations"

3. The degree of yin and yang, the changes of sun and moon, cold and heat, day and night, are all constant.

——[Song Dynasty] Cheng Hao's "Quotations"

4. The fate of heaven and earth, the longer it becomes civilized, the longer it becomes, and the more extravagant it becomes.

——Zhang Taiyan "After Reading Guanzi's Book"