We are taught that it's helpful to read books. But is it really helpful to read all books? Many books are not suitable for children, neither are they for adults. Some books should be prohibited. There are many books sold in markets which are fullof descriptions of violence and decadence. I don't think they are beneficial to us teenagers. So it's not definitely helpful to open all books. We should read some books that are recommended by teachers or parents. They know which are good for us. Furthermore, we should fight against those bad books that are harmful to our spirits.