The famous sayings about usefulness and uselessness are as follows:

1. Everyone knows the use of usefulness, but no one knows the use of uselessness. The use of uselessness is of great use. ——Zhuangzi

2. No matter what kind of knowledge you master, it is useful to intelligence. It will throw away useless things and retain good things. ——Leonardo Da Vinci

3. Being useful means a kind of slavery. Uselessness means existing only for yourself, and uselessness is the real freedom. Because it is useless, you can use it for yourself. ——Zhang Fangyu

4. The interesting things in the world, including poetry, wine, philosophy, and love, are often useless. Reciting useless poems, getting drunk on useless wine, reading useless books, and loving useless things, he finally became a useless person, but he lived a meaningful life because of it. ——Zhou Guoping's "Leisure"

5. Read some useless books, do some useless things, and spend some useless time, all in order to retain an opportunity to transcend yourself in life outside of everything known. Some of the most remarkable changes in the world come from moments like this. ——Liang Wendao

6. Because the oak tree was useless, it became a sacred tree and lived happily for centuries; because of its usefulness, the catalpa tree became a ghost under the sword and suffered year after year. to ruthless felling. This is the misfortune brought by usefulness and the luck brought by uselessness.

7. Van Gogh devoted his life's enthusiasm to art, but only sold one painting; Balzac worked day and night, but in the end he was poor; Michelangelo was exhausted in sculpture and painting. A lifetime of suffering only resulted in numerous illnesses... However, it was these "useless" works of theirs that opened one glorious door after another in art, shining brightly in the history of human civilization.

8. The knowledge in primary and secondary school textbooks is useless, but it helps us expand our thinking and broaden our horizons; mathematics is useless, but it stimulates the potential of the brain and makes people flexible; Confucius is useless because he does not know the grains, but he He is a master of Confucianism whom we admire; Zhuangzi is useless and does nothing, but he is also happy and carefree. From this point of view, a useless person is of great use. Useless things are caused by thick accumulation and thin hair.