1. If you learn without thinking, you will be in vain; if you think without learning, you will be in danger. 2. Never tire of learning and teaching. 3. A gentleman is magnanimous, but a villain is always worried. 4. If a person has no long-term worries, he must have immediate worries. 5. Be true to your word and bear fruit in your actions. 6. Never forget the past and be the teacher of the future. 7. It is tolerable, but what is intolerable? 8. My life has an end, but my knowledge has no end. 9. If you are poor, you can benefit yourself; if you are rich, you can help the world. 10. When I am old, I am in harmony with others; when I am young, I am in harmony with others. 11. The rope cuts the wood, and the water drops penetrate the stone. 12. A thousand-mile embankment was destroyed by an ant nest. Meaning: 1: (This sentence can describe you) If you study without thinking, you will be confused. If you only think without studying, you will stagnate. 2: You can’t be tired of learning, and you can’t be tired of teaching. 3: A gentleman behaves magnanimously, while a villain is sick and sick. State 4: People do not have long-term worries, but they will also have current worries. 5: What you say must be convincing, and what you do must have a beginning and an end. 6: Don’t forget everything, it may guide you in the future, that is, you must learn from the past in the future. Experience 7: I can’t bear it anymore, it’s reached the extreme 8: Life has an end, but knowledge is infinite (I encourage you to study hard and don’t stop) 9: In a small way, just cultivate yourself and improve yourself. In a big way, Then we must take into account the world and improve the quality of the whole people. 10: Treat (other) elderly people the same as you treat the elderly in your own family, and treat children the same way. 11: It is a metaphor that if you persevere, you will succeed. 12: No matter how big the project is, it may be caused by small details. destroyed