Augustine of Hippo : In order to attain that vision by which we see God as he is, he has warned us that our hearts must be cleansed. As objects are called visible in our fashion of speaking, so God is called invisible lest he be thought to be a material body. Yet he will not deprive pure hearts of the contemplation of his essence, since this great and sublime reward is promised, on the Lord's own word, to those who worship and love God. At the time when he appeared visibly to bodily eyes, he promised that his invisible being also would be seen by the clean of heart, "He that loves me shall be loved of my Father, and I will love him and will manifest myself to him." It is certain that this nature of his, which he shares with the Father, is equally as invisible as it is equally incorruptible. — LETTERS 147.19.48 Augustine of Hippo : So this faith is also a rule for salvation, to "believe in God the Father almighty," creator of all things, "king of the ages, immortal and invisible." He is indeed the almighty God who at the origin of the world made all things out of nothing. He is before the ages and made and governs the ages. He doesn't, after all, grow with time, or stretch out in space, nor is he shut in or bounded by any material. He abides with and in himself as full and perfect eternity, which neither human thought can comprehend nor tongue describe. — SERMONS 215.2 Augustine of Hippo : Let us hold firmly that Father and Son and Holy Spirit in their own proper nature, their proper substance, are together and equally invisible. We believe them to be together and equally immortal, together and equally imperishable. There is one place where the apostle states all these things simultaneously, "Now to the king of ages, immortal, invisible, imperishable, to the only God, be honor and glory for ever and ever. Amen." — Sermons 277.15 Gregory of Nyssa : We know that of all the names by which Deity is indicated some are expressive of the Divine majesty, employed and understood absolutely, and some are assigned with reference to the operations over us and all creation. For when the Apostle says "Now to the immortal, invisible, only wise God," and the like, by these titles he suggests conceptions which represent to us the transcendent power, but when God is spoken of in the Scriptures as gracious, merciful, full of pity, true, good, Lord, Physician, Shepherd, Way, Bread, Fountain, King, Creator, Artificer, Protector, Who is over all and through all, Who is all in all, these and similar titles contain the declaration of the operations of the Divine loving-kindness in the creation. — AGAINST EUNOMIUS 2.11 Jerome : But if you think that God is seen by those who are pure in heart in this world, why did Moses, who had previously said, "I have seen the Lord face to face, and my life is preserved," afterwards plead that he might see him distinctly? And because he said that he had seen God, the Lord told him, "You cannot not see my face. For no one shall see my face and live." For this reason also the apostle calls him the only invisible God, who dwells in light unapproachable, whom no man has seen nor can see. — Against the Pelagians 3.12 John Chrysostom : We must first turn our words to prayer. I say this because, sometimes, when prayer accompanies a teaching, it will serve to provide us with a demonstration of the things we are seeking to prove.… And Paul often does this at the beginning of his epistles. He first mentions God and then does not go on to his teaching until he pays to God the glory and praise due to him. Listen: "To the King of ages, the immortal, the invisible, the only God of wisdom, be honor and glory for ever and ever! Amen." — ON THE INCOMPREHENSIBLE NATURE OF GOD 3.2 John Chrysostom : "Now unto the King eternal, immortal, invisible, the only wise God, be honor and glory for ever and ever. Amen." For these things, then, we glorify not the Son only, but the Father. Here let us argue with the heretics. Speaking of the Father, he says, "To the only God." Is the Son then not God? "The only immortal." Is the Son then not immortal? Or does He not possess that Himself, which hereafter He will give to us? Yes, they say, He is God and immortal, but not such as the Father. What then? is He of inferior essence, and therefore of inferior immortality? What then is a greater and a less immortality? For immortality is nothing else than the not being subject to destruction. For there is a greater and a less glory; but immortality does not admit of being greater or less: as neither is there a greater and a less health. For a thing must either be destructible, or altogether indestructible. Are we men then immortal even as He? God forbid! Surely not! Why? because He has it by nature, but we adventitiously. — Homily on 1 Timothy 4 John Chrysostom : Why then do you make the difference? Because the Father, he says, is made such as He is by no other: but the Son is what He is, from the Father. This we also confess, not denying that the Son is generated from the Father incorruptibly. And we glorify the Father, he means, for having generated the Son, such as He is. Thus you see the Father is most glorified, when the Son hath done great things. For the glory of the Son is referred again to Him. And since He generated Him omnipotent and such as He is in Himself, it is not more the glory of the Son than of the Father, that He is self-sufficient, and self-maintained, and free from infirmity. — Homily on 1 Timothy 4 John Chrysostom : It has been said of the Son, "By whom He made the worlds." Now there is a distinction observed among us between creation and workmanship. For one works and toils and executes, another rules; and why? because he that executes is the inferior. But it is not so there; nor is the sovereignty with One, the workmanship with the Other. For when we hear, "By whom He made the worlds," we do not exclude the Father from creation. Nor when we say, "To the King immortal," do we deny dominion to the Son. For these are common to the One and the Other, and each belongs to Both. The Father created, in that He begat the creating Son; the Son rules, as being Lord of all things created. For He does not work for hire, nor in obedience to others, as workmen do among us, but from His own goodness and love for mankind. But has the Son ever been seen? No one can affirm this. What means then, "To the King immortal, invisible, the only wise God"? Or when it is said, "There is no other name whereby we must be saved": and again, "There is salvation in no other"? — Homily on 1 Timothy 4 John Chrysostom : "To Him be honor and glory forever. Amen." Now honor and glory are not mere words; and since He has honored us not by words only, but by what He has done for us, so let us honor Him by works and deeds. Yet this honor touches us, while that reaches not Him, for He needs not the honor that comes from us, we do need that which is from Him. In honoring Him, therefore, we do honor to ourselves. He who opens his eyes to gaze on the light of the sun, receives delight himself, as he admires the beauty of the star, but does no favor to that luminary, nor increases its splendor, for it continues what it was; much more is this true with respect to God. He who admires and honors God does so to his own salvation, and highest benefit; and how? Because he follows after virtue, and is honored by Him. For "them that honor Me," He says, "I will honor." How then is He honored, if He enjoys no advantage from our honor? Just as He is said to hunger and thirst. For He assumes everything that is ours, that He may in anywise attract us to Him. He is said to receive honors, and even insults, that we may be afraid. But with all this we are not attracted towards Him! — Homily on 1 Timothy 4 Methodius of Olympus : Fitly did that temporal king and Thy servant once sing of Thee as the King Eternal, saying, Thou art fairer than the children of men, who amongst men art very God and man. But the time would fail us, ages and succeeding generations too, to render unto thee thy fitting salutation as the mother of the King Eternal, — Methodius Oration Concerning Simeon and Anna Oecumenius : To the King of the ages, immortal, invisible, the only wise God, be honor and glory forever and ever. Amen. To the King of the ages. These things concerning the holy accepted Trinity. For such titles are common to the Father and the Son and the Holy Spirit. For these are found elsewhere concerning the Son, elsewhere concerning the Spirit, but now concerning the Father. to the only wise God. Having reasoned about Christ's love, Paul also remembers the Father and sends up praise to himself, so that no one might think the Father is a sharer in the love toward us. For on account of the love toward us, the holy Trinity must be glorified, since the love is common. Instruction concerning faithful and honorable service, which is without risk. — COMMENTARY ON 1 TIMOTHY Tertullian : It was of Him, too, that he had said in a previous passage: "Now unto the King eternal, immortal, invisible, to the only God; " so that we might apply even the contrary qualities to the Son Himself-mortality, accessibility-of whom the apostle testifies that "He died according to the Scriptures," and that "He was seen by himself last of all," -by means, of course, of the light which was accessible, although it was not without imperilling his sight that he experienced that light. — Against Praxeas Tyrannius Rufinus : He is the only Son of God, our Lord. For he is born One of One, because there is one brightness of light, and there is one word of the understanding. Neither does an incorporeal generation degenerate into the plural number or suffer division. The One who is born is in no way separated from the One who gives life. He is the one and only, the unique. He is as thought is to the mind, as wisdom is to the wise, as a word is to the understanding, as valor is to the brave. As the Father is said by the apostle to be "alone wise," so likewise the Son alone is called wisdom. He is then the "only Son." In glory, everlastingness, virtue, dominion, power, he is what the Father is. Yet all these he has not unoriginately as the Father but from the Father, as the Son, without beginning and equal. Although he is the head of all things, yet the Father is the head of him. For so it is written, "The head of Christ is God." — COMMENTARY ON THE APOSTLES' CREED 6