1. If you learn without thinking, you will be in vain; if you think without learning, you will be in danger. 2. If you review the past and learn the new, you can become a teacher. 3. Isn’t it true that one should learn and practice from time to time? Isn’t it great to have friends from far away? Isn't it a gentleman if a person doesn't know something but doesn't get upset? 4. Those who know well are not as good as those who are good at knowing, and those who are good at it are not as good as those who are happy. 5. If you are a person of three, you must have a teacher. Choose the good ones and follow them, and change the bad ones. 6. The beauty of a gentleman is not the evil of a man, but the villain is. 7. People with different paths do not seek each other. 8. Making mistakes without correcting them is called making mistakes. 9. A gentleman cherishes virtue, while a villain cherishes earth; a gentleman cherishes punishment, while a villain cherishes favor. 10. Only benevolent people can do good to others and do evil to others.