If a gentleman is knowledgeable and reflects on himself every day, he will be wise and act without fault. The original sentence is: "Therefore, wood will be straight when it is roped, and gold will be sharpened if it is sharpened. A gentleman is knowledgeable and reflect on himself every day." If you know yourself and do it without making mistakes, you will be able to make mistakes if you use the ink line to measure wood, and swords and other metal products will become sharp if they are ground on a whetstone. , and check and reflect on himself several times a day, then he will be wise and clear and his behavior will not be wrong.

The central idea of ????this sentence is that a gentleman studies extensively and often uses what he has learned to check his words and deeds, so that he will not be confused when encountering things, and his behavior will be without fault.

Extended information:

Creative background

During the Warring States Period, the slavery system further collapsed, the feudal system gradually formed, and history experienced epoch-making changes. Many thinkers expressed their own opinions on the social changes at that time from different standpoints and perspectives, and gradually formed different sects such as Mohism, Confucianism, Taoism and Legalism, which were historically known as "the Hundred Schools of Thought".

A hundred schools of thought wrote books one after another, promoted their own ideas and criticized others, resulting in a situation of "a hundred schools of thought contending". Xunzi was a representative figure of Confucianism in the late Warring States Period. He believes that the existence of nature is not dependent on human will, but people can use subjective efforts to understand it, adapt to it, and use it. In order to reveal the importance of acquired learning, he wrote the article "Encouraging Learning".