The classic "Being Perfect" comes from the first book of the Four Books. At the beginning of "University" written by Ceng Zi in the Spring and Autumn Period and the Warring States Period, there is such a sentence: "The way of a university is to be moral and for the people, and stop at perfection."
In other words, the fundamental reason for adult learning lies in their own goodness, which makes people abandon the old and welcome the new, abandon the evil and promote the good, and finally reach the perfect state of perfection.