It is never too late to correct mistakes. -Shakespeare

In the revolutionary cause, to realize one's own shortcomings is equivalent to correcting more than half. -Lenin

If you are not ready to be with others, you will be unprepared. -"Biography of Shang Yi Shu"

If the shoes fit, put them on. -Zhu

With copper as a mirror, you can be well dressed; Taking history as a mirror, we can know the rise and fall; Take people as a mirror, you can know the gains and losses. -"Old Tang Book Wei Zhi Biography"

Who can make mistakes? It's hard to change after that. -"Zuo Zhuan Gong Xuan Two Years"

Move (learn) when you see something good, and change it when you have it. -Zhouyi

It is unwise to know too much; Knowing without changing is not courage. -Li Gou's Book of Changes Nine

The real mistake is not to correct the mistakes that have been made. -The Analects of Confucius