Paradoxically, some of the sources of disbelief are to be found amongst the arguments of believers. … Theologians often formulated the most dangerously skeptical arguments in their efforts to test the impregnability of their own faith, and in doing so, they unknowingly furnished atheists with ready-made weapons.
Episode one: "Shadows of Doubt". - Atheism: A Rough History of Disbelief (2004)