I was born and raised Catholic. I was taught that God created everything--- the universe, myself, even my personality. But I rationalized to myself in my mid-teens "If God created me, and gave me this personality, then why would I value logic and rational thought, when believing in something I can not see, would be completely illogical? So therefor, God is illogical, and I value logic, so I do not value God. So I am destined to burn in the hell that was creaated? Doesn't that contradict the concept of free will? And if there is no free will, what about the concept of sin?" So pretty much every aspect of the "Word of God" seemed to crumble away with logic and reason. That is why I became an atheist.