"Xunzi's exhortation to learn" said: "Perseverance, rotten wood cannot be folded; Perseverance can open the stone. " It means: stop cutting, even dead wood should be cut; If you keep carving, then metal and stone can also carve patterns. This is where the idiom "perseverance" comes from.

Therefore, Xunzi placed great emphasis on subjective efforts. Emphasize the subjective efforts of others as well as your own.

Tang Yuanzhen's "Xingyang Poetry" says: "Carve rotten wood diligently and guide Meng Quan cautiously." It's interesting. It can also be seen that the spirit of "rope sawing wood, dripping water wears through the stone" is nothing more than a word "diligence". Compared with Confucius who called students "rotten wood cannot be carved", we should have ideological glory.