The easy way for us rid ourselves of whatever sanctimonious self-importance may have attached itself to us [Christians] is by simply (and constantly) remembering that we’re not better than nonbelievers. What we are is luckier than nonbelievers. We didn’t do anything to get saved. We didn’t deserve it. It’s not like God was holding auditions for an open spot in heaven, and we just so wowed him with our killer rendition of “Oklahoma!” or “Go Tell It On The Mountain” that we won.
Blog post by John Shore: On the Christian's Natural Sense of Superiority (extract from his book, I'm OK, You're Not: the message we're sending unbelievers and why we should stop.