The famous sayings about questioning are as follows:

1. You cannot see the truth without doubting. ——Li Siguang

2. People who don’t ask will always be together with ignorance. ——East Africa

3. Questioning customs from all aspects is an inevitable stage of development for every person with a higher ideological level. ——Emerson

4. The key to all science is undoubtedly the question mark. ——Balzac

5. Those who have no doubts in reading must learn to have doubts, and those who have doubts must have no doubts. This is the only way to make progress. ——Zhu Xi

6. The ears have no bottom and can be heard from morning to night. ——Africa

7. A person who is eager to ask questions is only five kinds of fools; a person who is ashamed to ask questions will be a fool for life. ——Anonymous

8. The spirit of skepticism is an important part of the scientific spirit. ——Zhou Guangzhao

9. A person who is good at asking questions is like attacking a strong tree. He will first change it, and then he will understand it. After a long time, he can explain it to each other. Those who are not good at asking will do the opposite. ——"Xue Ji"

10. A person who is good at doubting does not doubt what others doubt, but doubts what others do not doubt. ——Fang Yizhi

11. Teachers use doubts, and friends use doubts. ——Li Xing

12. Thinking starts with questions and surprises. ——Aristotle

13. Asking questions is more important than solving them. ——Einstein

14. There is no doubt that there will be doubts in learning. If there is doubt, there will be progress. If there is little doubt, there will be small progress. If there is great doubt, there will be great progress. ——Lu Jiuyuan Song

15. The problem is the midwife, it can help the birth of new ideas. ——Socrates

16. Scholars must first doubt. ——Cheng Yi

17. Question, rather than question, "A real singer can sing the silence in people's hearts."

——Chai Jing