The classic sayings about the good and evil of human nature are as follows:

1. Don’t bully the small, and don’t punish the big. It comes from "Shuoyuan·Zhiwu" written by Liu Xiang of the Han Dynasty. If small evil deeds are not intimidated, big evil deeds cannot be punished.

2. Greed is the foundation of all evil; lack of desire is the foundation of all good. From the Ming Dynasty Wang Tingxiang's "Shen Yan·Information Chapter". Greed is the root cause of many evil deeds. Being indifferent to desires is the cornerstone of many good deeds. Greed is the source of all sins. It is precisely because of people's dissatisfaction with material things that they develop all kinds of sinful psychology, and gradually break through moral barriers and embark on the path of evil.

3. Anyone who can be evil must be kind. Evil comes from selfishness, and people will hate me. From "Hundred Proverbs to Encourage Forbearance". Those who hate those who should be hated will surely become benevolent people. If you hate others because of your own selfish desires, others will regard you as their enemy.

4. Those who love to call people evil will also be hated by others; those who love to hate others will also be hated by others. It comes from "Shuoyuan·Shuocong" by Liu Xiang of Han Dynasty. People who like to speak ill of others will have others speak ill of them. He who likes to hate others will also be hated by others.

5. To conspire with someone who is jealous of oneself and to recruit a virtuous person who is jealous of others is to discuss the rule of Qiu with a fox. It comes from Baopuzi Boyu by Ge Hong of Jin Dynasty. Asking people who are envious of talents to recommend upright talents is like negotiating with a fox to make a fox fur coat. It is simply impossible.