1 Source: "The Analects of Confucius·Wei Zheng": "Knowing is knowing, not knowing is not knowing, this is knowing."

Explanation: Yes. To know is to know. It means that you have to have a correct attitude in learning, and it also means that you have to be honest in life.

Translation If you know, you know, and if you don’t know, you don’t know. This is a wise attitude.

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 attitude towards learning, a style of seeking truth from facts, and avoid the tendency of recklessness and vanity.

2 When we are three people walking together, I must learn from the words and deeds of others, and there must be something worth learning from me. Confucius's sentence "When three people walk together, there must be one who is my teacher", which was highly praised by future generations of intellectuals. His spirit of humbly learning from others is very valuable, but what is even more valuable is that he not only wants to take the good people as his teachers, but also the bad people as his teachers. This contains profound philosophy. His words are useful for guiding us in dealing with others, cultivating our moral character, and increasing our knowledge.