The famous sayings about spending time on worthwhile things are as follows:

1. All successful people in ancient times take their lives very seriously. Work as much as possible, work as much as possible, study as much as possible, and do not want to waste your time in vain.

2. I think the most precious thing in the world is "now", and the easiest thing to lose is "now". Because it is the easiest to lose, it is even more precious.

3. I only regret one thing, the days are too short and pass too fast. A person can never see what has been accomplished, only what should be done?

4. Whoever wastes their years will lose their youth and life will abandon them.

5. I advise you to cherish your beauty and don’t wait for passers-by to climb up and break it.

6. According to my observation, most people emerge in the time wasted by others.

7. Not loving the wall but loving the shade is difficult and easy to lose.

8. The fastest and slowest thing in the world, the longest and shortest thing, the most ordinary thing but the most precious thing, the most easily ignored and regrettable thing is time.

9. It’s late at night, and the sky is filled with clouds.

10. Saving time means making a person’s limited life more effective, which is equivalent to extending a person’s life span.

11. The situation treats no one well, and the hair grows into silk.

12. Time flies like an arrow, and the sun and moon fly like a shuttle.

13. Time is limited, not only because life is short, but also because there are many people involved. We should strive to use all our time to do the most beneficial things.

14. Sporadic time, if used quickly, can become complete time. As the saying goes, "the accumulation of soil creates a mountain." It is easy to lose a day, and there is no way to get it back.

15. We only live once in this world, so we should cherish our time. You must live a real life, a life of value.

16. Money and time are the two heaviest burdens in life. The most unhappy people are those who have so much of these two things that they don’t know how to use them.

17. The lights are on at three and the chicken is on at five. It is the right time for a man to make his determination. Black-haired people don't know how to study diligently early, and white-haired people regret studying late.