The saying that ordinary people cultivate themselves and keep their families in order can be traced back to the Confucian classic "University" at the earliest. "Da Xue" is one of the four books and one of the Confucian classics, and it is known as "the first classic of sage literature". There is a famous saying in "University": "The way of a university is to be virtuous and close to the people, and stop at perfection.

This sentence was said by Ceng Zi, a disciple of Confucius. He believes that self-cultivation means having morality, being close to the people and being perfect. "Self-cultivation" in this sentence refers to cultivating one's moral character and self-cultivation, and "governance" refers to correcting one's thoughts and behaviors.

In Confucianism, it is very important for mortals to cultivate self-cultivation and govern the country. Confucianism emphasizes the cultivation of personal cultivation and moral quality, and believes that if we can cultivate our self-cultivation and rule the country, we can reach the realm of sages. Therefore, the mortal's thought of self-cultivation and governing the country occupies a very important position in Confucianism.

In addition to Confucianism, Buddhism and Taoism also have their own views on mortal self-cultivation. Buddhism believes that self-cultivation is to get rid of troubles such as greed, anger and delusion, and to pursue spiritual purification and liberation. Taoism advocates conforming to nature, cultivating self-cultivation, and pursuing peace and freedom of mind.

In modern society, the idea of governing the country by self-cultivation is still of great significance. With the development and progress of society, people's pursuit of spiritual world is getting stronger and stronger. In this context, the idea of governing the country by self-cultivation has become an important way for people to pursue inner peace and spiritual purification.

Generally speaking, the phrase "all men have self-cultivation" can be traced back to the Confucian classic "University", which was said by Ceng Zi. In the thoughts of Confucianism, Buddhism and Taoism, mortal self-cultivation and governing the country have an important position.

In modern society, this thought is still of great significance and has become an important way for people to pursue inner peace and spiritual purification. I hope people can find spiritual comfort and guidance from the cultivation of mortals and embark on a better road.