Whatever one does, one should do it plain that they lack the ability to do ,something or that their difficulties are too great to be overe,For someone, this might be true. But for many others, this only shows that they have lost heart.
Why do people often feel frustrated even though they are capable of doing some thing? There are, among others, two main reasons. First, these people do not have a correct estimate of themselves. Second, they overestimate the difficulties.
It is passible to build up faith in oneself by having the right attitude towards one's own abilities. We should never underesrimate our abilities but should believe in the proverb:Where there is a will, there is a way. Confidence is the promise for fulfilling a task successfully.