An interesting story here from a former Presbyterian theologian and historian, whose studies of history and the early Church led him to the Catholic faith. His journey mirrors mine. I attended AOG churches in my teens, was a regular member of ISCF (Inter School Christian Fellowship) and invited my friends. After school and a couple of break (well, manual work) years, I studied theology, history and and biblical studies for four years plus post-grad. Then I was in full-time ministry for twenty-five years.

Ultimately my reading of the early Church fathers, and comparison of the faith of the early Church with that taught by protestant Churches made it clear that the early Church was the Catholic Church, and that the reformation was far from a reformation.