The motto that inspired me the most is: knowing is knowing, not knowing is not doing, and it is also right.

This is what Confucius said. It means: knowing is knowing, not knowing is not knowing, don't pretend to know.

My understanding is: if you can't do some questions in the exam, don't peek, otherwise you may get high marks at that time, but the result won't. If you don't peek, teachers and parents will tell you after the exam. So you can pass the final exam, otherwise you can't.

So, when we encounter a problem that we can't know, don't pretend to know. Especially in the classroom, we should constantly put forward what we are not clear about, and the teacher will make it clear to us.