There is a person who wants to hang a picture. He has nails but no hammer. The neighbor had a hammer, so he decided to borrow it from the neighbor.
At this moment, he became suspicious: what if the neighbors were unwilling to lend me the hammer? Yesterday he just greeted me carelessly, whether he was very dissatisfied with I am. What's the dissatisfaction? I didn't do anything wrong to him. It was him who was overcautious. If he lent it to me, would he think that I rely on him and still need him if something happens ...... Just because he has a hammer! I 've had enough.
So this man ran to him quickly and rang the doorbell. The neighbor opened the door. Before he could say "good morning", this man shouted at him, "Keep your hammer for yourself, you villain !"
Perception: negative thoughts cause wrong behaviors, and positive attitudes can avoid all unnecessary trouble and mistakes.