Like many people, I believe in the Bible because I believe in God. But I know plenty of people who think it ought to happen the other way around, that a person needs to believe the Bible in order to believe in God. So they'll give a Bible to a non-Christian in the hope that by reading about God, that person will be enlightened. Certainly that can happen, but it seems kind of backward to me. I mean, what possible reason would someone have for believing this story if they didn't already believe in God?
Doug Pagitt, A Christianity Worth Believing, p. 64
A bit ago, I saw a couple of accounts from this video.
More Than Dreams - DVD
The two I saw were the accounts of Khalil and Khosrow.
One thing of note in each of their accounts was that, for each of them, their starting point was the Bible--Khalil was given the assignment to study the Bible so as to prove it wrong, and Khosrow was given a New Testament when he visited a church.
Here is another site, with links to YouTube versions of the videos.
More Than Dreams: The Power of the Bible
Romans 10:17 (New International Version)
17Consequently, faith comes from hearing the message, and the message is heard through the word of Christ.
How could they have knows what to believe, had they not started with the Bible? These were men who already had faith in a god, what could have changed that except the Word of God?