Lest "young people don't work hard, old people are sad", and they will achieve nothing in the future and regret it. On the other hand, it emphasizes the kung fu of learning.
"Where" is the key to learning, that is, don't be satisfied with literal understanding, but practice, in practice.
Deepen understanding. Only in this way can we turn the knowledge in books into our practical skills.
On the relationship between books and practice, the poet emphasizes the importance of practice, which accords with the viewpoint of materialist epistemology. This view of the author not only
Learning and seeking knowledge in feudal society is a valuable experience, which is also very enlightening to people today.
Very valuable insights.