In this work, the author distinguishes between a faith which rejects all reason and a faith requiring that reason is self-critical. He addresses this central debate in the philosophy of religion in the light of the key arguments of Kierkegaard, Aquinas and Kant. The text leads the student through the traditional topics, such as knowledge of God’s existence, the problem of evil, and how someone could know that his or her religion had been based on revelation from God.