Ephrem the Syrian : For he who by the outward eyes was not able to see the Lord in His signs, he when those bodily eyes were closed, saw with those within. And because he had received the proof in his own person, he wrote to those who had their bodily eyes full of light—May He illumine the eyes of your hearts. Therefore the signs manifested to the external eyes of the Jews, profited them not at all; but faith of the heart opened the eyes of the heart of the Gentiles. — Homily - On Our Lord Gaius Marius Victorinus : Let us understand that we arrive at the full mystery of God by two routes: We ourselves by rational insight may come to understand and discern something of the knowledge of divine things. But when there is a certain divine self-disclosure God himself reveals his divinity to us. Some may directly perceive by this revelation something remarkable, majestic and close to truth.… But when we receive wisdom we apprehend what is divine both through our own rational insight and through God's own Spirit. When we come to know what is true in the way this text intends, both these ways of knowing correspond. — EPISTLE TO THE Ephesians 1.1.17-18 Jerome : His phrase "eyes of the heart" clearly refers to those things we cannot understand without sense and intelligence.… Faith sees beyond what the physical eyes see. Physical eyes are in the heads of not only the wise but the unwise. — Commentary on Ephesians 1:18-20 Jerome : It is not without effort that we come to "know the hope of our calling and the riches of God's inheritance in the saints." This effort in fact comes in response to that renewing gift which God himself gives in the glorious resurrection of his own Son. This gift he gives not once but continually.… Every day Christ rises from the dead. Every day he is raised in the penitent. — Commentary on Ephesians 1:18-20 John Chrysostom : "Having the eyes of your heart enlightened in the knowledge of Him." He that hath learned what God is, will have no misgiving about His promises, and disbelief about what hath been already brought to pass. He prays, then, that there may be given them "a spirit of wisdom and revelation." Yet still he also establishes it, as far as he can himself, by arguments, and from "already" existing facts. For, whereas he was about to mention some things which had already come to pass, and others which had not as yet happened; he makes those which have been brought to pass, a pledge of those which have not: in some such way, I mean, as this, "That ye may know," saith he, "what is the hope of His calling." It is as yet, he means, hidden, but not so to the faithful. "And," again, "what is the riches of the glory of His inheritance in the saints." This too is as yet hidden. "The riches of the glory," That is, the unutterable glory; for what language shall be adequate to express that glory of which the saints shall then be partakers? None. But verily there is need of grace in order that the understanding may perceive it, and admit even so much as at least one little ray. Some things indeed they knew even before; now he was desirous that they should learn more, and know it more clearly. — Homily on Ephesians 3 Tertullian : He likewise will grant "the enlightenment of the eyes of the understanding," who has also enriched our natural eyes with light; to whom, moreover, the blindness of the people is offensive: "And who is blind, but my servants? . — Against Marcion Book V Tertullian : In His gift, too, are "the riches (of the glory) of His inheritance in the saints," who promised such an inheritance in the call of the Gentiles: "Ask of me, and I will give Thee the heathen for Thine inheritance. — Against Marcion Book V