"I was raised a Catholic. What was fascinating for me was, even at the age of 10 or 11, the contrast between what frame of Catholicism you've been taught at church or in religious education, and the other aspects you could read about in history. The parts didn't fit together for me. So I became really interested in the connection between both, finding out what actually happened with the idea of religion in history. I think it's quite obvious that the spiritual basics of a religion, of a belief, do not have much in common with how religions are used. For example, if you take the Crusades, the actual act of war does not have much in common with what you can read about Christianity in the Bible."