Answer: To have courage, one must have faith. When you find yourself lost, and have no means to move forward, you lack courage. But when you have something to believe in, or have faith in, you gain the strength to move forward and continue ahead. With lack of faith, or belief in succeeding, a person will only go so far. You have to believe you can do it, have faith in yourself, without that awareness of "I can do it" you haven't the courage to try.
Hope this helps :)