Mr. C's little antique box is giving Mr. A fits. How could such a simple idea ruin his sleep and push him to abandon his atheism to become an agnostic? And why does he doubt his former confidence to deny the possibility of miracles and the existence of the God of Scripture? It seems the little brown box had shaken him to the core. Was he really a man of faith, and blind faith at that? Must an atheist really know everything about the universe and beyond to know that God does not exist? Was his atheism irrational? Atheists and agnostics pride themselves on being reasonable and scientific while viewing Christian faith as blind and unreasonable. But the opposite is true. Christian faith is neither blind nor unreasonable while the best arguments of atheism and agnosticism rest on false assumptions of faith. Moreover, the toughest arguments against Christianity and the truth of Scripture can become the means of stronger joy and faith in Christ when we see the unreasonable and unscientific nature of unbelief in the best of its proponents. All arguments against the existence and nature of God can easily be exposed as resting on unreasonable assumptions of blind faith. When Christians learn to see and understand these assumptions, they are not only equipped to refute the most difficult claims of unbelief, they will be encouraged in their faith in Christ and inoculated against intimidating arguments that would steal their joy and assurance.