Proofs
these proofs do not function as the necessary and proper foundation of the doctrine of God. They do not typically serve, as they did in Aquinas’ Summa, a demonstration of the ability of reason to point toward the same conclusion as is given by revelation, and therefore of the ability of reason to venture into theological discussion. Their primary purpose is to attack skepticism and atheism on the basis of a fundamental, but non-saving natural knowledge, including the innate knowledge of God or immediate sensus divinitatis shared by all people.
Richard A. Muller, Post-Reformation Reformed Dogmatics: The Rise and Development of Reformed Orthodoxy; Volume 3: The Divine Essence and Attributes (Grand Rapids, MI: Baker Academic, 2003), 192.