i saw first hand what happened when a pt employee of mine joined a well known door to door "evangelizing" type of cult
he went all fundie on me and suddenly everything in the bible was literal down to the fact that women could not be ministers, men could not sport beards (not in the bible though) and that there were exactly 144,000 people going to heaven...oh, and all from his church denomination and nobody else's of course
that poor guy was under so many restrictions due to the fact that he was one of a historically recent few who knew what the real truth and mission was of the universe