One thing that the military does believe in, is giving the soldier whose learning to overcome an obstacle some more chances with learning to pass an event in order to graduate. In life, there can only be so many chances but I believe if the individual takes it very seriously and commits he or she will most definitely reach a goal. It's mainly in the attitude which will really allow a person to do what's needed to get there.
If the will isn't there, then pretty much if the event is too difficult to complete then one can expect to always fail. Without preparing and giving some strong and consistent effort, there really can't be a successful attempt. I just need to personally learn to push myself with very little self-doubt and not worry about getting that cold rejection from mother nature when it does happen.