This sentence comes from Chapter 27 of the "Tao Te Ching" and is one of Lao Tzu's famous sayings. Although Laozi mentioned "Tao" and "Shu" many times in the "Tao Te Ching", the specific chapters and original texts are not clear, because the version and circulation of the "Tao Te Ching" are complicated, and there are many different versions and annotations. .

However, according to the overall idea of ??"Tao Te Ching", the meaning of this sentence is: if a person has morality but no skills or knowledge, he can acquire skills or knowledge through study and hard work; but if a person has If a person only has skills or knowledge but no morality, then his skills or knowledge are useless and his development will be greatly restricted.

In short, this sentence emphasizes the unity and importance of morality, skills, and knowledge, and reminds people that while pursuing knowledge and skills, they should also pay attention to their own moral cultivation and moral improvement.