1. Confucius said, "Learning from time to time is not as good as learning from time to time, is it? Is it not delightful to have friends coming from distant quarters? Isn't it a gentleman to be unhappy and not know it? "

2. Confucius said, "isn't it happy to learn (knowledge) and then practice (review) at a certain time?" Is it not delightful to have friends coming from distant quarters? Others don't know me, but I don't dislike it. Isn't it also a gentleman? "

3. Ceng Zi said, "I'm in three Japanese provinces (xǐng). I am unfaithful to others, but I don't believe in making friends, but I don't know how to pass it on. "

4. Ceng Zi said, "I reflect on myself many times every day: Have I tried my best to work for others? Am I honest with my friends? Have I reviewed what the teacher taught me? "

5. Confucius said, "Reviewing the past and learning the new can be a teacher."

6. Confucius said, "When you review old knowledge, you can have new experiences and discoveries, and you can learn from them."

7. Confucius said, "Learning without thinking is useless, and thinking without learning is dangerous."

8. Confucius said: "Reading without thinking is useless and at a loss; It is harmful to dream without reading.

9. Confucius said, "How can you teach a woman to know? Knowing is knowing, not knowing is not knowing, and knowing is also. "

10. Confucius said: "You, teach you the attitude of knowing and not knowing: knowing is knowing, and not knowing is not knowing. This is wisdom."

1 1. Confucius said: "See the sage Si Qi Yan, but if you don't see the sage, you will introspect."

12. Confucius said: "When you see a wise man, you should try to respect him. When you see an unwise person, you should reflect on whether he has similar problems. "

13. Confucius said: "There must be a teacher in a threesome; Choose good and follow it, change bad and follow it. "