Joe, there's nothing in that quote that wasn't meat and drink to mediaeval scholastics. An example is the question of whether God could will himself not to know something, so that free will could operate, or so that Jesus could actually suffer as a human. And similar debates took place in the Moslem world. Ad in similar circles- in debates between experts in their own scriptural field.

It's no good taking a snapshot of Christianity as it would like to see itself now, and comparing it with an equally two- dimensional view of another belief as we would like, perhaps, to see it. Religions in general are dynamic entities, and rational Islam exists as much as rational Christianity. And irrational Christianity exists too.

As soon as you posit a God who is all-knowing, all-powerful and all-good, you have an problem on your hands that no rational examination can resolve. So it's a bit sly to pretend that anything RELIGIOUS has been developed by reason. All that has really happened in Christendom is that religion has been tamed and forced to keep quiet about some of its key postulates.