Nine Levels of Madness and Madness

Hu Shi said: "The human heart is like heaven and earth, with infinite extremes and limited limits. Among them, good and evil are uncertain, desires are endless, and ultimately there are endless disasters. The way of heaven and man can be seen on the back of one's head. The four books are the wall, the Analects of Confucius, the deeds of Mencius, and the way of the university. , The virtue of moderation, the words and deeds are correct, and the morality is correct. The Five Classics serve as a guide, the Book of Songs has no boundaries, the book of rites has no boundaries, the hexagrams of Zhouyi have no rules, and the sword of Spring and Autumn has no sense.