Emperor Taizong's famous saying "Take the people as a mirror" can be linked with The Analects: choose the good and follow it, but change it without mercy. It means: choose the advantages of others to learn and correct their shortcomings (if I have them).

Example:

1, in a threesome, there must be my teacher. Choose the good and follow it, change the bad.

2, the benevolent is not worried, the knower is not confused, and the brave is not afraid. In a threesome, there must be a teacher; Choose the good and follow it, change the bad.

3, the threesome must have my teacher; Choose the good and follow it, change the bad. Mountain roads don't crawl under people's feet like smooth roads.