Less is nature, habit is nature. Confucius, a thinker and educator in the Spring and Autumn Period, was the founder of Confucianism.

Han Bangu, Biography of Han Jia Yi. The general idea of these two sentences is: it seems that young people are so natural when they are old, but in fact, habits become natural. Existence determines consciousness. People who live in society are bound to be influenced by the objective environment. Jia Yi's youth is mature, which seems to be his nature. In fact, he has long been cautious in his words and deeds and restrained his desires. After a long time, it has become a habit. These two sentences can be used to explain that people's ideological character and behavior are all formed in objective environment.