Many factors may make a contribution toones success, such as diligence, honesty, patience, responsibility and so on.Besides, as far as I am concerned, self-confidence is also an important and indispensable factor to contribute to ones success.
有很多因素可以促使一个成功，如勤奋，诚实，耐心，责任等。此外，在我看来，自信也是促成成功不可或缺的重要环节。
The following reasons can account for my above opinion. First,self-confidence is a kind of self-affirmation for our ability. A successful manis bound to believe in himself first so that he has courage and power to make some achievements. On the contrary, if he has great ability but does not believe himself enough, he will not be able to play his ability and power or at least cant play fully. Second, self-confidence is a great motivation for us to keep trying and keep going. A self-confident man will try his best to achieveh is goal again and again rather than say no or give up when he is confronted with hardship. In addition, a self-confident but not arrogant man usually brings some positive influence to the whole situation in a team. people around the man will be affected by his confidence and become confident for their teamwork.
以下几个理由可以解释我的观点。首先，自信是对自己能力的一种肯定。一个成功的人首先一定要相信自己，这样他才有勇气和力量去做出一些成绩。相反，如果他有很有能力，却不相信自己的话，他将无法发挥自己的能力和力量，至少不能充分发挥。第二，自信是我们不断努力前进的动机。一个自信的人会竭尽全力一次又一次的实现自己的目标而不是在面临困难的时候说不或放弃。此外，一个有自信而不傲慢的人通常会给整个团队带来积极的影响。周围的人都会被他的信心影响，从而对他们的团队有信心。
In summary, self-confidence is a significant character and quality in ones success. Therefore, we should try to develop our confidence but not arrogance to some extent so that we can succeed in our study or work.
总之，在人的成功道路中自信是很重要的因素。因此，我们要努力让我们在某种程度上自信而不自大，这样我们才可以在学习或工作上取得成功。