What is the full text of ancient poetry with copper as a mirror?

Li Shimin, Emperor Taizong of Tang Dynasty, said: "With copper as a mirror, you can dress your clothes;" Taking history as a mirror, we can know the rise and fall; Taking people as a mirror can give you a glimpse of gains and losses. "

Song? Ouyang Xiu, Song Qi? New Tang book? Volume 1 10? Biography 22

Li Shimin, Emperor Taizong of Tang Dynasty, loved to listen to and make good use of various suggestions, and he was well versed in the principle 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. "

"Take people as mirrors". It means learning from others. That is, learn from its successes and failures, so as to avoid repeating the same mistakes.