1. My life has a limit, but my knowledge has no limit.

2. If young people don’t work hard, old people will be sad.

3. There are three paces of time: the future arrives belatedly, the present flies by like an arrow, and the past stands still forever.

4. The lights are on at three o'clock and the chicken is on at five o'clock. It's when men are studying. Black-haired people don't know how to study early, and white-haired people regret studying late.

5. An inch of time is worth an inch of gold, but an inch of gold cannot buy an inch of time.

6. It is easier for a young person to learn than to become an old man, so no time is wasted.

7. Whoever is stingiest with time will be more generous with time. If you want time to live up to you, you must first live up to time. He who gives up time, time also gives up on him.

8. One difficulty in life is how to make an inch of time equal an inch of life.

9. Time is life, time is speed, and time is power.

10. The most serious waste is the waste of time.