1. It is best not to fantasize about anything when the sun sets, but to get into work when the sun rises. ;; Xie Juezai

2. Walking and running are safer; standing is safer than walking; sitting is safer than standing; lying down is safer than sitting. ;;India

3. People who think they are smart often do not play. The smartest people in the world are the most honest people. Because only honest people can withstand the test of facts and history. ;; Zhou Enlai

4. Zhuge was cautious in his life, but Lu Duan was not confused in important matters.

5. Nothing is more ignorant than rashness. ;;Wilde

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 make it easier, and then he will understand it. After a long time, he will 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 will not doubt what others suspect, but will doubt what others doubt. ;; Fang Yizhi

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

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

13. Raising questions is more important than solving them. ;;Einstein

14. There is no doubt that there will be doubts in learning, doubts will lead to progress, small doubts will lead to small progress, and great doubts will lead to 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 out the silence in people's hearts." ;; Chai Jing

18. Doubt is the beginning of thinking and the end of learning. ;;Confucius

19. Those who do not doubt when there is doubt have never learned; learning requires doubt. ;;Zhang Zai

20. Deep in the human heart, there is a deep-rooted need, which is to hope that oneself is a discoverer, researcher, and explorer. In the spiritual world of children, this need is particularly strong. ;;Suhomlinsky