Do you control what you believe?

[festive1]

I'll just throw this out there... I don't have the source, but I know I've read about this phenomenon: If you have a moving religious experience by a certain age (before the brain is fully developed, I believe towards the end of adolescence), certain areas of the brain related to critical thinking shut down. Thereby, if one doesn't have a moving religious experience early in life, one is A) less likely to have faith, and B) more open to different ideas. By having this exposure to a moving religious experience, I'd assume there would be a greater difficulty later in life of overcoming one's beliefs. Which is where you get the fundamentalists who simply won't listen to reason or accept proof or factual evidence. Thoughts?