I always remember Wilson's famous saying: Believe in yourself, then devote all your efforts - if you have such a concept, there is an eighty or ninety percent chance that you will succeed in doing anything. Indeed, people are sometimes very weak. When something hasn't been done yet, they start to think about the results of failure. In this way, it will inevitably add unnecessary mental burden, resulting in insufficient mobilization and play of internal potential, and thus become timid before difficulties, or even cause self-seclusion and self-suppression, leading to psychological imbalance finally.