1. If jade is not polished, it will not become a tool; if a person does not learn, he will not know. -- "Book of Rites"

2. In terms of time, there are junior high school and post-middle school; in terms of day, it is called today, yesterday and tomorrow; in terms of body, there is a period of youth and strength. --Liu Yuxi

3. My life has a limit, but my knowledge has no limit. -- Zhuangzi

4. Read thousands of volumes, and write like a master. --Du Fu

5. Learning without thinking is a waste, thinking without learning is a disaster. --Confucius

6. Ask the canal how clear it is, because there is a source of living water. --Zhu Xi

7. The lights are on at three o'clock and the chickens are on at five o'clock, which is when men are studying. Black-haired people don't know how to study diligently early, and white-haired people regret studying late. --Yan Zhenqing

8. The trick to learning a lot is not to learn a lot all at once. -- Locke

9. Grasp what you are most interested in, and learn it step by step from the shallower to the deeper.

--Hua Luogeng