How Do We Know God Exists?

How Do We Know God Exists? Five arguments to defend your faith. In an increasingly secular world, Christians face more pressure to justify their beliefs. Confronted by confident atheists, can you be sure your faith in God is reasonable? In How Do We Know God Exists?, William Lane Craig offers five air-tight arguments for God’s existence. Not only are these arguments rational, but they have not been disproven—let alone adequately challenged. You can have confidence that your faith is grounded.