Whatever one does, one should do it with confidence. If one has no confidence, there is little possibility that one can achieve anything when faced with hardships. This truth seems to be self-evident. In reality, however, we do see a lot of people who always complain that they lack the ability to do something or that their difficulties are too great to overcomes. For some, this might be true. But for many others, this only shows that they have lost heart.Why do some people often feel frustrated even though they are capable of doing something? I think there are two main reasons. First, these people don't have a correct estimate of themselves. Second, there is another possibility that they overestimate the difficulties.

In my opinion, one night build up faith in oneself as long as a right attitude towards his own abilities. We should neither underestimate nor overestimate our abilities. As a proverb says, "Where there is a will, there is a way." With confidence we can certainly cope with any task we are faced with."

参考翻译：（好学英文网）

一个人不管做什么事都要有信心。如果一个人没有信心，那么当面对困难的时候很难能够办成任何事。这个道理似乎是不言自明。事实上，我们总是看到很多人抱怨自己没有足够的能力做一件事，或者很难克服如此大 的困难。对于一些人而言，可能是这样。但对于大多数人来说，这仅仅表明他们缺乏信心。为什么一些人有能力做一件事却总是感到沮丧呢？我认为有两个原因。首先，这些人对自己没有一个正确的认识。其次，有另一种可能就是他们高估了困难。

在我看来，相信自己的能力并有一个正确的态度很快就能建立起自信。我们不能低估或高估自己的能力。就像谚语说的：有志者事竟成。只要有自信，我们必然能够应对各种困难。