2.  Let them dismiss, therefore, these questions of dialectics and examine the truth, not with mischievous exactness but with reverence.  The judgment of our mind is given us for the understanding of the truth.  Now our God is the very truth. ἡ αὐτοαλήθεια.  So the primary function of our mind is to know one God, but to know Him so far as the infinitely great can be known by the very small.  When our eyes are first brought to the perception of visible objects, all visible objects are not at once brought into sight.  The hemisphere of heaven is not beheld with one glance, but we are surrounded by a certain appearance, though in reality many things, not to say all things, in it are unperceived;—the nature of the stars, their greatness, their distances, their movements, their conjunctions, their intervals, their other conditions, the actual essence of the firmament, the distance of depth from the concave circumference to the convex surface.  Nevertheless, no one would allege the heaven to be invisible because of what is unknown; it would be said to be visible on account of our limited perception of it.  It is just the same in the case of God.  If the mind has been injured by devils it will be guilty of idolatry, or will be perverted to some other form of impiety.  But if it has yielded to the aid of the Spirit, it will have understanding of the truth, and will know God.  But it will know Him, as the Apostle says, in part; and in the life to come more perfectly.  For “when that which is perfect is come, then that which is in part shall be done away.” 1 Cor. xiii. 10.  The judgment of the mind is, therefore, good and given us for a good end—the perception of God; but it operates only so far as it can.