1. The original sentence says: "You can become a teacher by reviewing the old knowledge and learning the new."

Translated Confucius said: After reviewing the old knowledge, you can have new understandings and new discoveries. With this, you can become a teacher.

2. The original sentence says: "Learning without thinking will lead to failure; thinking without learning will lead to peril."

Translated Confucius said: If you only read without thinking, you will be confused and confused. Being at a loss as to what to do; just dreaming without reading will be harmful.

3. Original sentence Confucius said: "If you are not worried about others, you don't know them; when you are worried, you don't know others."

Translation Confucius said: "You are not afraid that others do not understand you, but you are afraid that you do not understand others.

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4. The original sentence says: “Isn’t it just right to learn and practice it over time? Isn’t it a joy to have friends from afar? Isn’t it a gentleman to be unhappy if someone doesn’t know it?”

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Translation Confucius said: "Isn't it also happy to learn (knowledge) and then practice (review) it at a certain time? Isn't it also happy to have like-minded people coming from afar (to come here)? People If you don't understand me, but I don't resent you, aren't you also a gentleman?"