1. If a worker wants to do his job well, he must first sharpen his tools. ——Confucius's "The Analects of Confucius·Wei Linggong",

To do something well, preparation is very important

2. Learning without thinking will lead to confusion, and thinking without learning will lead to peril. ——Confucius' "The Analects of Confucius: For Politics"

It means that if you study diligently without thinking carefully, you will be at a loss. It is even more dangerous to only take exams without studying hard.

3. When three of us travel together, we must be our teacher. Choose the good ones and follow them, and change the bad ones. ——Confucius's "The Analects of Confucius·Shuer"

Three people are walking together, and among them there must be my teacher. I choose his good aspects to learn from him, and when I see his bad aspects, I correct my own shortcomings.