Confucius saw a cultural relic in the ancestral temple dedicated to Lu Huangong. He asked the temple keeper, "What is this?" Temple Zhu replied: "This is a qo device. People put it on the side of the seat to warn them of their words and deeds." Confucius said, "I've heard about it for a long time. Empty is oblique, middle is positive, and full is opposite. " Later, Confucius asked his disciples to fill the container with water. When the water is half full, the container is upright; When the water was full, the container suddenly fell down. Confucius sighed deeply and said, "When something is full, it will be covered. The same is true of people, be modest and not complacent. "

In the Romance of the Three Kingdoms, Liu Bei is a modest man. In order to restore the Han Dynasty, he visited Zhuge Liang's thatched cottage. He was not proud of Zhuge Liang's inferiority, but lowered his status and visited again and again. Zhuge Liang finally felt sincere and promised to do it for him. Liu Bei's modesty has brought the world.

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