From: Biography of Wei Zhi, an old Tang book.

Original: With copper as a mirror, you can dress; Taking history as a mirror, we can know the rise and fall; Take people as a mirror, you can know the gains and losses.

Interpretation: A person can see whether his clothes and hats are properly dressed by looking at copper as a mirror. Taking history as a mirror, we can know the reasons for the rise and fall of the country; Looking at people as a mirror, you can find your own right and wrong.

Extended data:

Li Shimin, Emperor Taizong of Tang Dynasty, loves to listen to and make good use of various suggestions, and understands the truth that "listening to others is bright, while being eccentric is dark". Zheng Wei, an admonisher, went to Chen Qi for dozens of times and advised Taizong to reflect on himself, be prepared for danger in times of peace, treat others with courtesy and take good advice.

After the death of Wei Zhi, Emperor Taizong personally mourned and sighed: "Taking copper as a mirror can make you dignified and tidy when wearing it; Taking history as a mirror, we can know the rise and fall of existence since the dynasties; Taking people as a mirror' is deeply impressed by people's behavior, so as to understand their own gains and losses. I have kept these three mirrors in case I pass by. Now that Wei Zhi is dead, so am I. "

"A person who takes copper as a mirror can make his clothes and hats wear correctly; Taking history as a mirror, we can know the reasons for the rise and fall of the country; Looking at people as a mirror, you can find your own right and wrong. After Kevin·Z died, I lost a good mirror. " -This is the highest evaluation of Wei Zhi's life value.

Baidu encyclopedia-taking copper as a mirror