Knowing means knowing, and not knowing means knowing, and not knowing means not knowing.

what you know is what you know, and what you don't know is what you don't know. This sentence comes from China's ancient classic The Analects of Confucius, which is a famous saying of Confucius.

This sentence expresses two meanings. It emphasizes an honest attitude. When we are faced with knowledge or facts, we should seek truth from facts, do not pretend to know, and do not deliberately show ignorance. This is not only responsible for yourself, but also respect for others.

This sentence also points out the attitude towards learning. Knowing means knowing, and not knowing means not knowing, which reflects the modesty and modesty of learning. We should keep an open mind, keep learning and exploring, admit our own shortcomings and try to make up for them.

This sentence also implies a cautious and prudent attitude. When we are faced with unknown or uncertain things, we should remain humble and cautious, and not easily draw conclusions or make judgments. This can not only avoid making mistakes, but also improve your cognitive level.

The famous saying about learning attitude in The Analects of Confucius:

1. I visit my body three times a day: Is it disloyal to others? Make friends without believing them? Can you pass it on? I have to reflect on myself every day: Have I done my best for others? Is it sincere to associate with friends? Have you reviewed the knowledge taught by the teacher? This sentence tells us to constantly reflect on our actions and words, find our own shortcomings and improve them.

2. learn from the times, isn't it? This sentence means to review in time after studying, isn't it pleasant? Here, learning refers to learning knowledge, which means timely and timely, while learning means reviewing and practicing. It means happy. This sentence tells us to review what we have learned in time, so that we can better grasp and understand it.

3. Reviewing the past and learning the new can be a teacher. This sentence means that reviewing old knowledge can gain new insights from it, so that people can become teachers. This sentence emphasizes the importance of reflection and learning. Only by continuous reflection and learning can we gain new knowledge and understanding. At the same time, this sentence also implies the role and responsibility of teachers. As teachers, they should constantly study and reflect, and constantly update their knowledge and ideas, so as to better educate and guide students.