Don't give up?

Have you ever felt like giving up on something because it has become too hard to continue or it seems that there are unsurmountable obstacles in your way that you don't know how to overcome?  There is no easy solution to some problems, but if you give up you will never know if it was worth it to see it through to the end.  Giving up now may seem easy, but you have to keep telling yourself to keep pushing forward and get the job done.