The more eager we are for success, the more likely we are to make mistakes. The key lies in the host of the normal heart experiment: a German psychologist did an experiment: when threading a small sewing needle, the more you concentrate, the less likely it is to be threaded. In the scientific community, this phenomenon is called "purpose trembling". The stronger the purpose, the less likely it is to succeed. This phenomenon is not uncommon in life. From the performance point of view, many mistakes are accidental, but in fact they are inevitable, because everyone has such a weakness: when you pay too much attention to something, you will be nervous; When you are nervous, you will often have adverse reactions such as accelerated heartbeat, distraction and dyskinesia. Many people fail at the juncture of life, and psychological tension and anxiety are one of the important reasons.