When people are young, their attention is focused, but when they grow up, they are easily distracted. Therefore, they should be educated early to avoid missing good opportunities. When I was seven years old, I recited the Lingguang Palace Fu. Today, I have not paid attention to it for ten years but I still will not forget it. After the age of 20, the scriptures I have recited will be discarded if I don’t pay attention to them for one month. However, some people live in difficult circumstances and do not have the opportunity to study in their prime. They should continue to study later and not give up. Confucius said that when I study "Yi" at the age of fifty, I will be free from major mistakes. Wei Wu and Yuan Yi, the older they get, the more profound they are about learning. They all learned in their youth and did not tire of it even in old age. Zengzi did not start learning until he was 70 years old, but he became famous all over the world. Xunzi began to study at the age of 50 and continued to travel, and was still a great Confucian. Gongsun Hong did not start studying the Spring and Autumn Annals until he was in his 40s, and became the prime minister by virtue of this. Zhu Yun did not start studying Zhouyi and the Analects of Confucius until he was 40, and Huangfu Mi was not taught until he was 20. The Classic of Filial Piety and The Analects of Confucius: They all became bachelors, and they all indulged themselves early in the morning and went to bed at night (those who forget about food and sleep, go to bed early and get up late). People say it's too late if they don't study before they get married, and then they start to be lazy. It's really stupid. Those who study in childhood are like the newborn sun, and those who study in old age are like walking at night with candles lit, better than those who can't see anything with their eyes closed.