Not true.. I personally know of several people that never read the bible or had any dealings with those that did. yet, met the the most high God out in the bush.. Subsequently finding their way to other Christian's for fellowship, eventially.. And fit right in..
The Body of Christ is NOT a club.. or a University.. its not what you know its who you are..
Not sure how that has anything to do with "knowing" the Bible is from God without a priori knowledge of that - in other words, taking it for granted that it is based on someone else's word. We all come to believe that the Bible is God's Word based on what someone else told us - and we believed them.
The Body of Christ is NOT a club
It consists of people who belong to Christ. What is your definition of a "club"?
Regards