“I have therefore found it necessary to deny knowledge in order to make room for faith.” Since it is not possible to know God (because he is a part of the noumenal realm), our positing of the existence of God can only be a matter of faith, and faith can have nothing to do with real knowledge and understanding. This conclusion with respect to reason is the foundation from which Kant begins to critique the historic proofs for the existence of God. He critiques both Anselm’s “ontological” proof and Thomas Aquinas’s proofs.
