People say that self-confidence is half of the success that can bring you courage to stick to what you do. Without self-confidence, one can not do well in anything.  Self-confidence is of great importance and value to a person.

人们说自信是成功的一半，它能给你带来勇气去坚持你所做的事。没有自信，一个人就不能做好任何事。自信对一个人很重要也很有价值。

Firstly, self-confidence enables us to have the ambition of being successful. Only when you have the ambition to be successful, can you be successful eventually. Secondly, once we gain self-confidence, we will possess the courage and strength to overcome the setbacks and difficulties. With self-confidence, no one and nothing can stop you to success.Thirdly, with self-confidence we may accomplish something which seems to be impossible previously. No great thing is easy for us, therefore we should hold the idea that anything is possible. We should, or have to trust in ourselves.

首先，自信使我们拥有成功的雄心。只有当你有成功的野心的时候，你最后才能成功。其次，一旦我们获得了自信，我们就拥有了勇气和力量去克服挫折和困难。有了自信，没有人也没有什么能够阻止你成功。再次，有了自信我们可能实现一些以前看起来不可能的事。没有什么大事对我们是容易的，因此我们应该相信一切皆有可能。我们应该，或者必须相信自己。

In short, self-confidence is the spiritual pillar of a person as well as the inherent power, which is of great importance and value to a person.

总之，自信是一个人的精神支柱也是一个人的内在力量，它对一个人很重要也很有价值。