I suppose the answer might be Paul. OK, OK. You say he is in the Bible. But, but…
if you think about Paul, you see a man whose mission was to destroy as many Christians as possible and to stamp out Christianity. And he did this for several years after Christ’s death and resurrection. He was not a believer; not one of the twelve; not among a wider group of desciples. He was the enemy, and a violent one at that.
This Paul, suddenly becacomes an ardent follower of this Christ he despised so much. His work after that; the sacrifices he made and his subsequent death come as a result of that conversion.
What man in his right mind would do that unless he acted on something more than an illusion?
Would you or anyone go to the lenghts Paul did on a whim?
He had heard the story of Jesus and His death. He killed the followers of Christ. He was a deeply faithful Jew. So what would it take for a man like that to make a 180 degree turn and go in the exactly opposite direction?
The Jewish state, the temple, all his friends were against this. He lost everythign as a result of his decision. And he essentially “moved out of suburbia”, if you will and lived in the street with the rejected and the persecuted.
Pauls’ witness is part of the New Testament. His decision to follow Christ goes against everything he believed untile then, and against his self interest. He did it after the events described in the Bible took place.
I hope this helps a little.