If you want to do something important, but you fail every time you do it, what should you do?

Does crying make you feel better? I am not one of those who give up, but such failure can really make me cry...and it can make me infuriated. But I won't give up - I am very patient. Also, what if there is no solution to the problem and you have to keep failing every day for the rest of your life... how do you muster the courage to move on?