Tertullian, Apologeticus, § 17:  “That which is infinite is known only to itself.  This it is which gives some notion of God, while yet beyond all our conceptions—our very incapacity of fully grasping Him affords us the idea of what He really is.  He is presented to our minds in His transcendent greatness, as at once known and unknown.”  Cf. Phil. Jud. de Monarch. i. 4:  Hooker, Eccles. Pol. I. ii. 3:  “Whom although to know be life, and joy to make mention of His name; yet our soundest knowledge is to know that we know Him not as He is, neither can know Him.”