With clarity and philosophical rigor, this accessible work shows that the existence of God is a question for reason, not laboratory instruments. Drawing on the enduring proofs of the medieval tradition, it demonstrates how careful reflection on reality leads to certainty about God’s existence and His perfections, including His knowledge, power, and presence. Written by a seasoned scientist committed to intellectual honesty, this book dispels confusion about the limits of science and reveals the profound harmony between sound reasoning and faith in the Creator.