The Clarity of God's Existence examines the need for theistic proofs within historic Christianity, and the challenges to these since the Enlightenment. Historically (and scripturally), Christianity has maintained that unbelief is inexcusable. If failing to know God is a sin, the implication is that humans can and should know God. Humans should know God because his eternal power and divine nature are clearly revealed in the things that are made. And...