When you look at the religious landscape—even among many groups that claim to be Christian—you’ll find any number of fantastic claims regarding personal knowledge of God. St. Cyril of Jerusalem reminds us that what we best know about God is how little we really know:

…of God we speak not all we ought (for that is known to Him only), but so much as the capacity of human nature has received, and so much as our weakness can bear. For we explain not what God is but candidly confess that we have not exact knowledge concerning Him. For in what concerns God to confess our ignorance is the best knowledge.