What's the story between Wei Zhi and Emperor Taizong?

On one occasion, Emperor Taizong asked Wei Zhi, "Why are some people wise and others fatuous in history?" Wei Zhi said: "It is wise to listen to opinions from all sides; If you only listen to one-sided words, you will be fatuous (classical Chinese means' listen to the light, listen to the dark'). " He also cited the historical examples of Yao, Shun, He and said: "If the ruler who rules the world can adopt the following opinions, then his feelings can be realized, and his cronies can fool as much as they want."

Extended data:

Li Shimin was the second emperor of the Tang Dynasty. He was also the second son of Emperor Gaozu Li Yuan and Empress Dou. He initiated the famous rule of chastity in the history of China, and is regarded as one of the most outstanding politicians, strategists and poets in history.

Zheng (February 1 1, 580-643), a politician, thinker, writer and historian in the Tang Dynasty, was called "a generation of celebrities" by later generations because of his outspoken suggestions and assistance in the great cause of "Zhenguan rule" initiated by Emperor Taizong.

In the seventeenth year of Zhenguan (643), Wei Zhi died of illness. Official to Dr. Guanglu, whose name is Zheng Guogong, and posthumous title is "Wen Zhen". Keep the funeral simple. In the same year, he entered Lingyange. ?

References:

Baidu Encyclopedia-China's famous minister in the early Tang Dynasty-Wei Zhi

Baidu Encyclopedia-Li Shimin (Emperor Taizong)