Learning is like sailing against the current. If you don't advance, you will retreat.

A good scholar should learn from others' strengths to make up for his own shortcomings.

4. At the beginning of life, human nature is good, similar and far apart.

A sage who cares more will lose something, and a fool who cares more will gain something.

6. If you don't work hard, you will be sad.

7. Young people don't know how to study hard, and old people regret studying late.

8. I don't know how to learn early with black hair, but I regret learning late with white hair.