There is such an experiment: a long-distance runner takes part in a five person group competition. Before the competition, the coach said to him, as far as I know, the strength of the other four people is not as good as yours, so this athlete easily ran the first place. Then the coach asked him to attend a decury game, the coach usually other people's achievement for him, he found someone's records and not as good as their own, he easily run first, then, the athletes also participated in the twenty group game, the coach said, a person as long as you overcome them and you can win the game, the coach said he followed the player, and in the final sprint, and won the first place. Later, in another place, before the game, on the other athletes, coaches and not to communicate with him, in the group of five games, he reluctantly took the first, then decury games he slipped to second, twenty people in the game, he only took fifth. In fact, the other contestants in each group were exactly the same as the first. It doesn't help me to remind me of the story of my school. In primary school, he is a leader in the class, the first thought is none other than non own; up to junior high school, many people think, you can take an examination of a top ten is good, so once admitted to the top 10, was pleased with oneself. After high school, the goal is lower, even if the examination is a little discrepancy, it also comforts himself: so many high hands, already very good. In this way, I step from excellence to mediocrity step by step. Yes, in life, no one will ever tell us about the strength and ability of a competitor. So in the face of more and more people around, we start at a loss, or active oneself "improperly belittle oneself," to a lower position. This may be the way forward, and many people are going to go.