1. As the British writer Fielding said: "Bad books are like bad friends, they may kill you." If you understand "opening a book is beneficial" one-sidedly and read all books, It is not right to say that it is beneficial to read without choosing or considering the content! We must learn a skill to choose the most valuable and insightful books that are suitable for ourselves to read.

2. Opening a book is not necessarily beneficial, and sometimes (if you read bad books) it will cause damage. As the educator Xu Teli said: "Some people read books often and do nothing that is not beneficial to the body and mind." Most of the unhelpful things come from reading bad books. The fact that some teenagers commit crimes in today's society is a good proof that their minds have been polluted by those bad books and periodicals, and they have become infected with bad habits, which eventually leads them to commit crimes.

3. Liu Xiang of the Han Dynasty once said: "Books are like medicine, and reading them well can cure stupidity." Since books are medicine, they have two functions: one is good medicine, which can cure diseases; Poison kills people. Isn't it? In Germany in the 1920s, many people were said to be buried in Hitler's grave because of their negative influence after watching Hitler's "Mein Kampf". "A bad book is like a bad friend, it may kill you." It’s not false at all. Nowadays, some students are obsessed with martial arts or romance novels. They read those weird books all day long and “throw away” their homework, which leads to a continuous decline in academic performance and finally results in a failure to draw water from a bamboo basket. All in vain. Just think about it, can "opening" such a book be said to be "beneficial"? "A good book is better than a treasure, and a bad book is worse than a robber." Therefore, whether opening a book is beneficial, we must first look at it. What volume to open.

4. Bishigaqiu in Gogol's "Dead Ghosts" reads everything. He is not a learned man, but a fool who lacks appreciation; "Zhuangzi: Lie Yuguan" Zhu Zeman, he learned a special dragon-killing technique. In fact, there are no dragons to kill anywhere, so he realized that there are no dragons in the world, and his skills are useless. In this way, if you open the book indiscriminately, you will always get half the result with half the effort and do more harm than good!

5. Ma Su is familiar with military books and talks about the art of war fluently. When Jieting was in charge, he ordered the army to set up camp in a mountain with no food and water. As a result, they were surrounded by Sima Yi and cut off the water source, which led to failure. It can be seen that just opening the book blindly may not be beneficial. What is more important is practice and flexibility.