What is the motto of Harvard University Library?

In fact, there is no motto on the wall of Harvard University Library, which the author explained afterwards.

As for what he wrote:

1. Take a nap now, and you will dream; But study at this moment, and your dream will come true

2. Today, which I left uncultivated, is the tomorrow that people who died yesterday prayed for

3. When I think it is too late, it is the earliest time

4. Don't put off today's work until tomorrow

5. Learn like a dog and play like a gentleman

6. Now lazy and sleepy saliva will

9. The pain of studying is temporary, and the pain of not learning is lifelong.

1. learning this matter is not a lack of time, but a lack of effort.

11. Happiness may not rank second, but success must rank second.

12. Learning is not the whole of life. However, since even a part of life-learning can't be conquered, what else can we do?

13. Please enjoy the unavoidable pain.

14. Only by working harder earlier than others can we taste the taste of success.

15. No one can succeed casually, it comes from thorough self-management and perseverance.

16. Time is running out.

17. Education level represents income.

18. After a day, you won't come back.

19. Even now, opponents keep turning pages.

2. No hardship, no gain.