David Livingstone is quoted as saying... "I determined never to stop until I had come to the end and achieved my purpose." Sometimes we have to be determined to fight. No matter what, like I told a friend today, look at satan and say "I refuse to kill myself, so if you want me, you have to come in and get me... and If it kills me, hey I'll go to heaven."
Here is a good article.. I actually found it while searching for an old poster my daddy gave me a copy of when I was younger. He was "in"couraging (word I created) me not to give up. So I encourage you... Don't EVER give up!