its a goal. not the only.
to epistole: you only bring up statistics. think how many chrisitans who call themselves christian but arent really christian?
just goes to say, just cuz ur in a garage, doesnt mean ur a car. (as comparable to church to a church goer).
and it can be argued that christianity is not a religion, more of an umbrella of many different denomination/ religions that have a single common belief.