The reason people want to give up is because their focus is on the wrong thing.
As Christians we are to run the race of sharing the Gospel and being the feet and hands of Jesus. We are to live out the life of righteousness and be a light to a dark world. We won't do it perfectly, but we must go forward and not give up.
Focus your eyes upon the man Jesus and remember He went through the same trials and tribulations. He is our way of escape.