The author considers a possible dialogue between Saint Thomas Aquinas and representatives of the New Atheism. His interest focuses on the controversy about the existence of God. The paper is divided into three parts. In the first part the author presents main claims of the doctrine of the New Atheism. In the second he shows different conceptions of mind (reason) and rationality. In the last he presents Saint Thomas’ conception of rationality based on his metaphysical system. Undertaken considerations lead to a conclusion that the correct conception of mind (reason) is a possible starting point in possible discussion with the New Atheism.
