What does this poem mean? "Jewelry houses are full of people who guard against theft. You can't sleep at night and worry about it every day. Why do you read a lot of poetry books, with both good news and wisdom? " My room is full of jewels, so I can't sleep every night. I'm afraid these jewels will be stolen. It is better to keep all the books in your heart (your heart is full of knowledge), so that wealth and wisdom coexist, and you are not afraid of stealing or being robbed, and happiness will follow. If you go to school, it means that you are worried about going to school, and the latter sentence encourages you to study hard. Only learning knowledge well is your real way out!