Here’s a fascinating take on the current mini-wave of atheist literature (by Dawkins, et al) that’s come out recently. The author describes a series of challenges of atheism to theism – and shows how these can be used to strengthen a theist’s position, and faith. For example:

Virtuous atheists actually have a stronger claim to real goodness than virtuous Christians, Jews, or Muslims, because there can be no taint of cupboard love in their obedience to the moral law. They do not believe in a reward for goodness, and thus must love goodness for its own sake. The challenge to religious people is that they ought to do the good as if there were no afterlife, no heaven, no reward. God does not get a reward for all the good things he does, and if we are supposed to become as much the image of God as we can, as we are told in the scriptures, then we should seek out that life of love and service that is its own reward.

The author of the piece is also the author of a book called Natural Religion. It looks a little far-out, and I have not read it, but the description sounds like an interesting insight into the different ways truth is manifest.