1. It is questions that inspire us to learn, practice, and observe. ——Bobol

2. Often problems are raised but cannot be solved because the internal connections of things have not been exposed.

3. Creation starts with problems. Only when you have problems can you think. Only when you have thinking can you find ways to solve problems and the possibility of finding independent ideas. ——Tao Xingzhi

4. What is a problem? The problem is the contradiction of things. Wherever there are unresolved conflicts, there are problems.

5. The wisdom of life probably lies in asking why everything happens. ——Balzac

6. Doubt is the key to knowledge. ——UK

7. Doubt can destroy yesterday’s faith and open the way for tomorrow’s faith. ——Romain Rolland

8. When reading, you will have doubts about the unknown at the beginning; secondly, you will gradually have doubts; in the middle, you will always have doubts. After this, doubts will gradually be cleared up, until you have a thorough understanding and no doubts, and then learning begins. ——Zhu Xi

9. Asking the right questions often means solving most of the problems. ——Heisenberg

10. In order to correctly understand the truth, we must first doubt it and argue with it. —— Novalis

11. I don’t have any special talents, I just like to get to the bottom of things. ——Einstein

12. To solve the problem, systematic and thorough investigation and research work must be done. This is the process of analysis. Asking the question is where the contradiction lies.

13. A smart person will always ask questions. ——India

14. If a person starts from affirmation, he will end with doubt; if he is prepared to start from doubt, he will end with affirmation. ——Britain

15. If an article or a speech is important and instructive, it must ask a question, then analyze it, and then synthesize it to indicate the nature of the problem and provide as a solution.

16. A person who knows nothing will not doubt anything.

——UK