If you see good things, move on (learn), and if you make mistakes, change them. ——"Book of Changes·Yi·Xiang"

Don't hesitate to correct your mistakes. ——"Shang Shu·Zhong Hui (huǐ)'s Edict"

If you don't be prepared for others, if you fail to check yourself. ——"Shang Shu Yi Xun"

Is there anyone who has no fault? If you can change your past, there is no greater good. ——"Zuo Zhuan·Xuan Gong Second Year"

To make mistakes without correcting them is to make mistakes. ——"The Analects of Confucius·Wei Linggong": If you make a mistake and don't correct it, this is really called a mistake.

Using copper as a mirror, you can straighten your clothes; using ancient times as a mirror, you can know the ups and downs; using people as a mirror, you can understand gains and losses. ——"Old Tang Book Biography of Wei Zheng"

Those who speak are not guilty, but those who hear are warned. ——Bai Juyi's "Nine Books of the Yuan Dynasty"

It is unwise to make mistakes without knowing it; it is not courageous to know but not be able to change. --plum? "Book of Changes Ninth"

You will be happy if you have heard about it, you will not hide your mistakes if you know them, and you will not be afraid of correcting them. ——Lu Jiuyuan "With Fu Quanmei"

Change it if it exists, and encourage it if it doesn't. ——Zhu Xi's "Annotations to the Four Books·Analects of Confucius" Volume 1

It is not more valuable than having no mistakes, but more valuable than being able to correct them. ——Wang Shouren's "Repair"

Qin's evil people died after hearing about their mistakes, but Han's good plans were able to prosper after hearing about their mistakes. ――Xue? Volume 10 of "Shu Lu"

Correcting one's faults and carrying forward one's good qualities are called "cultivation". ——Yan Yuan, "Records of the Words and Deeds of Mr. Yan Xizhai"

Honesty words are unpleasant to the ear but are beneficial to action; good medicine is bitter to the mouth and beneficial to the disease.

――"Zengguang Xianwen"