There is a meal, a stream, a fish and a blanket. What does it mean to teach the mouse to bite the desk?

There is a blanket for the fish to sleep in, and the book on the desk means: there is a fish when eating and a blanket when sleeping. How could you have the heart to let the books on the table be bitten by mice?

Liu Kezhuang's poem "Swallowing Cats" in Song Dynasty.

Original: The ancients raised guests, but lacked cars and fish. Now you are not as good as a guest. Eat with blankets, sleep with blankets, and teach mice to eat desks and books.

In ancient times, people didn't necessarily have fish and cars for every meal. Now, what kind of credit do you have to make customers worse than you? There are fish when eating and blankets when sleeping. How could you have the heart to let the book on the case be bitten by a mouse?

This is a poem that blames cats. The poet keeps a cat at home. Every day, he feeds the cat the brook fish that he can't bear to eat, and spreads the blanket that he can't bear to cover. He is full of expectation that it can protect bookshelves and protect his favorite books from rats. As a result, the mouse bit his desk book and couldn't help asking the cat a question.