The original text is "(Taizong) said to the courtiers when he tasted the court:

My husband can dress himself with copper as a mirror; Taking the past as a mirror, we can know the rise and fall; Take people as mirrors, and you can see the gains and losses. I always protect these three mirrors to prevent myself from passing. Now that Wei Zhi has died, one mirror has died. ".

use copper as a mirror (when there was no glass mirror, the ancients used bronze mirrors for dressing) to see if they were dressed. Finishing clothes;

Taking ancient history as a mirror, we can know the reasons for the rise and fall of historical dynasties.

You can recognize your own right and wrong by taking the faithful admonisher as a mirror.

Mainly, Emperor Taizong expressed his affirmation of Wei Zhi and his regret for losing him.