It means that knowing means knowing, and not knowing means not knowing. This is true wisdom.

From "The Analects of Confucius·Wei Zheng".

This is a widely circulated famous saying of Confucius. Later generations will be used to remind people to treat knowledge issues with an honest attitude and without any hypocrisy or pride. It is necessary to develop a down-to-earth and serious learning attitude, a pragmatic style, and avoid the tendency of recklessness and vanity.

Extended information:

The Analects of Confucius was written during the Spring and Autumn Period and the Warring States Period. It was recorded and compiled by Confucius's students and his students who re-transmitted it.

The Analects of Confucius involves many aspects such as philosophy, politics, economics, education, literature and art, etc. It is very rich in content and is the most important classic of Confucianism.

In terms of expression, the language of "The Analects" is concise and vivid, making it a model of quotation-style prose.

In terms of arrangement, "The Analects" does not have a strict compilation style. Each article is a chapter, and chapters are collected into chapters. There is no close connection between chapters and chapters, but they are roughly classified and there are repeated chapters. Appear.