On Proving God and the Possibility of Metaphysics Considering Kant's Criticisms

God's arguments have been faced challenges in the modern philosophy. The most systematic assaults have been done by Immanuel Kant who considered the theoretical reason as incapable of proving or denying God; although in the realm of practical reason he postulated the existence of God. The purpose of this essay is to prove God in theoretical reason and to respond to Kant's objections in this regard. In this way, it is shown that metaphysics, at least minimally, is possible. The antinomies of pure reason, the proof of necessity and contingency, the ontological argument, and the connection between Aristotle's logic (also Islamic philosophy) and reality are some of the issues discussed in this article to achieve the purpose. Although it must be accepted that the reason must not transcend the experience in reflecting the pure concepts then it gives rise to the antinomies, Kant's argument about the systematic inaccuracy of any passage of experience seems unjustifiable.