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 high level of thinking. ——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 fool’s arrows are all shot at once. ——Britain

7. If you don’t take care of it when you use it, it will be damaged; if you don’t do it carefully, you will fail. ——Mongolian

8. One careful consideration is better than a hundred hasty actions. ——Yugoslavia

9. A hundred people full of confidence and determination are much better than ten thousand cautious and respectable (respectable) people. ——Sinclair

10. An ounce of caution is worth a pound of knowledge. ——UK