Thanks to Rich Shipe for alerting me to this listing of Ten Arguments for the Existence of God. Some of them I had never heard of before (e.g., the argument from aesthetics; the argument from arguments; the argument from evil).
Of course, such arguments are not the basis for true faith. Few of us believe in God because of such chains of reasoning. And to know there is a God tells us nothing about His disposition to us. For that we need Him to reveal Himself to us, which He does in His Word. And such arguments tell us nothing about Christ, that God has come in the flesh as a human being. And such arguments tell us nothing about the Cross, how the incarnate deity took into Himself the world’s sin and suffering to redeem us all. (That point has always seemed to be a powerful response to the problem of evil put forward as an argument against God’s existence.)
Still, these arguments are intriguing and helpful in their own spheres, and an answer to the assumption that religious belief is somehow anti-rational.