Opening a book is beneficial "is an

Opening a book is beneficial "is an idiom encouraged by the ancients to read. In the past, when I read a bad book, I often felt deceived by the ancients. Now I have gained a little more intelligence, and in turn, I feel that the ancients are not deceiving me. In short, after reading a good book, I can gain what its benefits are. But after reading a bad book, knowing the reasons and places for its harm is also a gain. Confucius once said," When three people walk together, there must be my teacher, It may not necessarily be considered from the positive side, but on the negative side, it can also serve as a warning.