You ask me why the canal water here is so clear, because the source water is running water. In other words, you ask him why he has so much knowledge, because he has read many books.
The cultivation of human feelings is the article to see the world, the world is knowledge, and feeling the feelings between people is the article. This couplet tells the true feelings of the world!
Learning to distinguish right from wrong is a very hard course, but only in this way can we gain insight.
Falling red is not something without feelings, even if it turns into spring mud, it is willing to cultivate beautiful spring flowers to grow.
Ask the landlord if he is in the sixth grade!