I agree with theadydal. I have been through phases in my life that I could not have gotten through without a belief in something other than myself (god, family, friends etc..).Sometimes belief can be the only thing that motivates someone to try to pick themselves up.
Yes its still all their own work, but they may not have done any of that work without inspiration and belief.
i.e. I know I am capable of doing great things but if I didn't have something to motivate me I wouldn't even try.