Today, I read an article called "Flying Wooden Box", which tells us that joy begets sorrow. At all times, we should maintain a balanced mentality, without ecstasy, sadness, arrogance and rashness. What is said is: don't be too happy, too sad, and not arrogant and impetuous when you encounter anything.

　　I was reminded of this sentence: once, I was walking on the road and suddenly found money in 1 yuan. I went to the canteen happily and bought an ice cream. Someone bumped into me and my ice cream fell to the ground. I was very sad. I still remember one time, when I was reading in the book corner of my class, I suddenly stumbled across my book. I don't know who tore my book corner. Finally, I found out who it was, and I also tore his book corner. I was really happy and sad.

　　What I remember most is that I saw a remote-controlled helicopter on the way to travel again. I wanted it, but my mother refused to buy it. I dragged my mother not to let her go. My mother said to buy me other toys, but I just didn't want it. Finally, I came to the store. I saw the deformation tank. I asked my mother for it. It was only 5 yuan, so my mother bought it for me. I was happy to go home.