The interpretation timeline
1 Timothy 1:17 Douay-Rheims

Now to the king of ages, immortal, invisible, the only God, be honour and glory for ever and ever. Amen.

A.D. 220 – 1871 10 witnesses 13 excerpts

Patristic

before A.D. 750
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“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.”
Source
311
A.D.
c. A.D. 260–311
“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,”
395
A.D.
Gregory of Nyssa Patristic
c. A.D. 335–395
“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. 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. In other cases, however, 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.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“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."”
Source
“"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. 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. 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"? "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!”
Source
411
A.D.
Tyrannius Rufinus Patristic
c. A.D. 345–411
“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."”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“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.”
Source
“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.”
Source
“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."”
Source

Scholastic

c. 1100 – 1500
1273
A.D.
Thomas Aquinas Catholic
1225–1274
“Above he showed his own condition, both as to sins under the law and as to the goods in the time of grace; here he shows the reason for these benefits, which is taken from divine mercy. And first he sets forth divine mercy in general; second he applies it to himself, at the words "of whom I am the first"; third he sets forth the giving of thanks, at the words "but to the king of ages." Concerning the first he does two things: first he commends the truth about to be proposed; second he sets forth the divine mercy, at the words "because Christ Jesus." As to the first he says, "a faithful saying," etc. Now there are two things to be commended in a saying, namely that it be true and that it be acceptable. For sometimes a true saying is harsh, and stirs up hatred. Gal. 4:16: "I have become your enemy, telling you the truth." But this saying, first indeed, has truth; hence he says, "a faithful saying." Apoc., last chapter: "these words are most faithful and true." Likewise it is acceptable, because it concerns our salvation; therefore he says, "and worthy of all acceptance." Zach. 1:13: "and the Lord answered the angel who was speaking," etc. Another text has: "a human saying," because it concerns the taking up of men. Titus 3:4: "the kindness and love for mankind of our Savior appeared," etc. And this saying is such: "that Christ came," etc. That he came into the world expresses a twofold nature, namely that of divinity, in which he existed before he appeared in the world. John 16:28: "I came forth from the Father, and came into the world," etc. And that of humanity, in which he appeared. And because he is God, he fills heaven and earth, Jer. 23:24; therefore it does not belong to him according to the divine nature to be in any place, but it belongs to him according to the human nature. John 1:10: "he was in the world, and the world," et cetera. "He came unto his own," et cetera. But for what did he come? "To save sinners," that is, for the salvation of the peoples. John 3:17: "For God did not send the Son into the world to judge the world, but that the world might be saved through him." John 12:47: "For I did not come to judge the world." But if no one had been a sinner, would he not have been incarnate? It seems not, because he came to save sinners. Therefore the incarnation would not have been necessary. Likewise the Gloss: "take away the disease, and there will be no need of medicine." I answer. It must be said that this is sufficiently clear from the words of the saints. But this question is not of great authority, because God ordained the things to be done according as the things to be done actually were. And we do not know what he would have ordained, if he had not foreseen sin; nevertheless the authorities seem expressly to declare that he would not have been incarnate, if man had not sinned — toward which side I myself incline more. Then when he says "of whom I am the first," he applies this to himself. First confessing himself a sinner; second he says that he was saved, at the words "but I obtained mercy." He says therefore, "of whom I am the first." Here a certain heretic says that the soul of Adam was in Paul, and passed from body to body — as if to say: I am the first sinner, because the soul of Adam is my soul. But this is against the Apostle, Rom. 9:11: "when they were not yet born," etc. Therefore the soul does not exist before the body. He is first, therefore, not in time but in the greatness of his sins. And he says this out of humility. Prov. 18:17: "the just man is first the accuser of himself." Prov. 30:2: "I am the most foolish of men," etc. But was the Apostle really the greatest sinner? And it seems that Judas was greater. But some say that Paul's sin was more general, because it was against the whole Church. But this is nothing, since Paul acted in unbelief, whereas many Jews persecuted out of malice. It must be said, therefore, that he is first, not because he was the greatest among the sinners who then existed, but the greatest among sinners who were saved; as if to say: he came to save sinners, of whom — namely, of the sinners saved — I am the first; which is to be understood of those who preceded the Apostle, since even before him many others had persecuted the Church. And he says this in order to show that everything God does, he does for the showing forth of his own goodness. Prov. 16:4: "the Lord has worked all things for himself." Ecclesiasticus: "his work is full of the glory of the Lord." Likewise for our benefit; and therefore he says, "therefore he saved me." First for his own glory. Hence "first" is expounded as first in time, or as first, that is, most especially. "All patience," that is, perfect patience, because though provoked he did not punish, but rather exalted his adversary, and this for our benefit; hence he says "for an example," that is, for instruction and edification — as if to say: so that sinners might not despair of approaching him. 1 Peter, last chapter: "made a pattern of the flock." Then when he says "to the king," etc., he sets forth the giving of thanks, and concerning this he does two things: first he commends him to whom thanks are given; second he renders thanks, at the word "honor." Now he commends him, first, from his power; second, from the property of his nature. As to the first he says, "to the king." His dominion is the greatest, because he alone rules, and has free power, not according to statutes, as a political ruler does. But God alone is the lord of all. And therefore he says, "to God." Apoc. 19:16: "king of kings and lord of lords." Ps. 46:7: "for God is king of all the earth." Likewise the power of any king, for the most part, lasts no more than fifty years, but this one is of all ages. Ps. 144:13: "your kingdom is of all ages," etc. Ecclesiasticus 10:4: "the power of the earth is in the hand of God." To whom also belongs the property of the nature of God. Concerning this it must be known that among things, the first difference of natural things is the corruptible and the incorruptible. And of incorruptible things, some are visible and corporeal, such as the terrestrial bodies; but some are invisible and spiritual, such as the angels. And these, according to the Platonists, are divided into gods, who are supreme by nature, and into intellects, which are not gods but are divine, and into souls; but among us there is one God alone. Deut. 6:4: "hear, O Israel, the Lord your God." He says therefore, first, "immortal," to distinguish him from corruptible things; "invisible," to show that he belongs to the invisible, and to distinguish him from other visible things. He says "to God alone," and not "alone immortal," or "alone invisible," because he alone is God by nature, although he could be called "alone immortal," and "alone invisible," that is, special above the others. Below, last chapter: "who alone has immortality." Then when he says "honor and glory," he gives thanks; as if to say: honor is to be shown to him from the subjection of the whole creature, and in manifestation of his own most excellent goodness, brightness, and glory. Apoc. 7:12: "blessing, and brightness, and wisdom, and thanksgiving, honor, power and strength to our God." "Forever and ever," because the age of others lasts but a little time. Is. 40:6: "all flesh is grass, and all its glory as the flower of the grass." Then when he says "this commandment," etc., he instructs Timothy to remain in the things that are said. First he recalls what has been entrusted to him; second he admonishes him to the due use of it; and third he teaches the manner of using it. He says therefore, "this commandment" — namely, that you keep the end of the law, that is, that you preserve charity always, and not the fables of the Jews — "I commend to you," as a faithful deposit, because it has been entrusted to you for this reason. And how? "According to the preceding," etc., that is, because this Gospel does not disagree with the prophecies which he had learned before, since he was the son of a Jewish woman. 2 Peter 1:19: "we have a more sure prophetic word, to which you do well to attend, as to a lamp shining in a dark place," etc. 1 Thess., last chapter: "do not despise prophecies," etc. Or "according to the preceding," that is, according to what I and other holy men knew through the spirit of prophecy was to be handed on to you concerning you. "That in them you may war," namely in those prophecies, "the good warfare." Warfare is twofold: one spiritual, one carnal. 2 Cor. 10:4: "the weapons of our warfare are not carnal, but mighty to God," etc. In a good warfare two things are required on the part of the soldier: namely, that he do nothing contrary to military discipline, and that he not grow slack through idleness. 1 Cor. 9:25: "everyone who competes in the contest abstains from all things," etc. Likewise on the part of the warfare two things are required: namely, that it fight down those opposed to the commonwealth, and that it subject those who ought to be subject. So too it is in the spiritual warfare, because it is ordered to destroying all who exalt themselves, and to subjecting every understanding to the obedience of Christ, as is said in 2 Cor. 10. And this is the true warfare, of which he says "that you war," etc. Where also, first, the manner of using it is set forth, and second its necessity, at the words "which some." He says therefore, "that you war," etc., as if to say: you can indeed wage the good warfare, first through the good faith which you have. 1 John, last chapter: "this is the victory that overcomes the world, faith," etc. Likewise through a good conscience, because a man easily withdraws from that which bites him; hence the remorse of conscience is like a certain goad, which pricks the one who has a bad conscience, and therefore he quickly withdraws from sins through a good conscience and right faith. Acts 23:1: "I have lived before God in all good conscience until this day." 2 Cor. 1:12: "this is our glory, the testimony of our conscience." The necessity of a good conscience is consequently shown, when he says "which some," etc.; where first he sets forth the fault; second the punishment; third the fruit of the punishment. The fault, at the word "which" — namely, a good conscience — "certain men, thrusting away, have made shipwreck concerning the faith." For he who errs against the faith loses everything that he has. Heb. 11:6: "without faith it is impossible to please God." Likewise he dies, because "my just man lives by faith," Habakkuk 2:4, and Rom. 11:17 — "of whom are Alexander and Hymenaeus." 2 Tim. 4:14: "Alexander the coppersmith did me much harm," etc. Then their punishment is set forth, when he says "whom I have delivered," etc., because he excommunicated them, so that the faithful might avoid them, lest they defile them. Now the excommunication of the Apostle was of such power that those excommunicated were soon seized upon by the Devil, and vexed bodily. 1 Cor. 5:4f.: "you being gathered together, and my spirit, in the power of the Lord Jesus, to deliver such a man to Satan for the destruction of the flesh, that the spirit may be saved." Yet even now men are delivered up to be vexed spiritually, because they lose the suffrages of the Church, which help much against the Devil. And "I have delivered" just as God "delivered up to a reprobate sense," Rom. 1:28, as it were withdrawing his help, and the communion of the Church, and its suffrages. And this not out of hatred, but out of charity for their profit. 1 Cor. 5:5: "that the spirit may be saved." Hence he says, "that they may learn," at least through punishment, "not to blaspheme." Now one learns to withdraw from sin in three ways: sometimes, namely, through punishment, when he is vexed bodily; likewise through the confusion of excommunication; likewise from this, that when the Church delivers someone to Satan, he falls into manifest sins, whence, confounded, he is humbled, and abstains even from the hidden sins, which before he did not know himself to have.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Now unto the King eternal,.... This doxology, or ascription of glory to God, on account of the grace bestowed upon the apostle, may be considered, either as referring to all the three divine Persons, Father, Son, and Spirit, who are the one and only God; and to whom all the attributes of wisdom, power, eternity, immortality, or incorruptibleness, and invisibility, belong; and who are jointly concerned in the grace bestowed upon any of the sons of men. Or else to God the Father, in agreement with a parallel place in Rom 16:27 who is the only true God, in opposition to nominal and fictitious deities, though not to the exclusion of the Son and Spirit; and to whom the several epithets here used may be unquestionably given: he has shown his wisdom in the works of creation, providence, and grace; he is the everlasting King, or the King of ages, or of worlds; he is Maker of the worlds, and the Governor of them throughout all ages and generations; he only has immortality, and is the incorruptible God, and who is invisible, whose shape has never been seen, nor his voice heard: or else this may be thought to belong to Jesus Christ, since it is to him the apostle gives thanks for putting him into the ministry; and from him he obtained mercy, and received abundant grace; and he it was who came into the world to save sinners, and who showed forth all longsuffering in him, see Ti1 1:12, upon which the apostle breaks out into this attribution of glory and honour, and which agrees with Jde 1:25. And everything here said is applicable to him; he is the eternal King, whose is the kingdom of nature, providence, and grace; his throne is for ever and ever, and of his kingdom and government there is no end; he is the "King of ages", as the phrase may be rendered, and so his kingdom is called , "the kingdom of all ages", Psa 145:13 and which endures throughout all generations; and this distinguishes him from all other kings. Scarce any king ever reigned an age, but Christ has reigned, and will reign throughout all ages. No regard is here had, as some have thought, to the Aeones of the Gnostics and Valentinians; but rather the apostle adopts a phrase into his doxology, frequently used by the Jews in their prayers, many of which begin after this manner, "blessed art thou, O Lord our God, "the king of the age, or world", &c. and , "Lord of all ages, or worlds", &c. (p). Other attributes and epithets follow, as immortal or "incorruptible". Christ is the living God, and the living Redeemer; and though he died as man, he will die no more, but ever lives to make intercession for his people, and to reign over them, and protect them: who also may be said to be "invisible", who was so in his divine nature, till manifest in the flesh; and now in his human nature he is taken out of the sight of men, and is not to be beheld with bodily eyes by men on earth: and he is the only wise God; he is "the only God", so the Alexandrian copy, the Syriac and Vulgate Latin versions, read; not to the exclusion of the Father or Spirit, but in opposition to all false deities, or those who are not by nature God: and he is the only wise God; who is wisdom itself, and of himself; and is the fountain of wisdom, both natural and spiritual, unto others; wherefore to him be honour and glory for ever and ever, Amen. Christ is crowned with honour and glory, and he is worthy of it; and it becomes all men to honour the Son, as they do the Father: he is the brightness of his glory, and equal to him; and the glory of deity, of all the divine perfections, and works, and also worship, should be given him; as well as the glory of salvation, and of all the grace the sons of men partake of; and that not only now, but to all eternity, (p) Seder Tephillot, fol. 2. 2. & 3. 2. & 37. 1, 2. Ed. Basil. fol. 2. 1, 2. & 3. 1. & 4. 1. & 5. 2. & passim, Ed. Amsterdam.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Now unto the King eternal - This burst of thanksgiving and gratitude to God, naturally arose from the subject then under his pen and eye. God has most wondrously manifested his mercy, in this beginning of the Gospel, by saving me, and making me a pattern to all them that shall hereafter believe on Christ. He is βασιλευς των αιωνων, the king of eternities; the eternity a parte ante, and the eternity a parte post; the eternity that was before time was, and the eternity that shall be when time is no more. Therefore, ever living to justify and save sinners, to the end of the world. Immortal - Αφθαρτῳ· Incorruptible - not liable to decay or corruption; a simple uncompounded essence, incapable, therefore, of decomposition, and consequently permanent and eternal. One MS., the later Syriac in the margin, the Vulgate, one copy of the Itala, and some of the Latin fathers, read αθανατῳ, immortal, which our translation follows; but it is not the original reading. Invisible - Αορατῳ· One who fills all things, works everywhere, and yet is invisible to angels and men; the perfect reverse of false gods and idols, who are confined to one spot, work nowhere, and, being stocks and stones, are seen by every body. The only wise God - The word σοφῳ wise, is omitted by AD*FG, Syriac, Erpen's Arabic, Coptic, Sahidic, Ethiopic, Armenian, Vulgate, and Itala. Some of the Greek fathers quote it sometimes, and omit it at others; which shows that it was an unsettled reading, probably borrowed from Rom 16:27 (note). Griesbach leaves it out of the text. Without it the reading is very strong and appropriate: To the only God; nothing visible or invisible being worthy of adoration but himself. Be honor - All the respect and reverence that can be paid by intelligent beings, ascribing to him at the same time all the glory - excellences, and perfections, which can be possessed by an intelligent, unoriginated, independent, and eternal Being; and this for ever and ever-through eternity.”
Source
1871
A.D.
1871
“A suitable conclusion to the beautifully simple enunciation of the Gospel, of which his own history is a living sample or pattern. It is from the experimental sense of grace that the doxology flows [BENGEL]. the King, eternal--literally, "King of the (eternal) ages." The Septuagint translates Exo 15:18, "The Lord shall reign for ages and beyond them." Psa 145:13, Margin, "Thy kingdom is an everlasting kingdom," literally, "a kingdom of all ages." The "life everlasting" (Ti1 1:16) suggested here "the King eternal," or everlasting. It answers also to "for ever and ever" at the close, literally, "to the ages of the ages" (the countless succession of ages made up of ages). immortal--The oldest manuscripts read, "incorruptible." The Vulgate, however, and one very old manuscript read as English Version (Rom 1:23). invisible-- (Ti1 6:16; Exo 33:20; Joh 1:18; Col 1:15; Heb 11:27). the only wise God--The oldest manuscripts omit "wise," which probably crept in from Rom 16:27, where it is more appropriate to the context than here (compare Jde 1:25). "The only Potentate" (Ti1 6:15; Psa 86:10; Joh 5:44). for ever, &c.--See note, above. The thought of eternity (terrible as it is to unbelievers) is delightful to those assured of grace (Ti1 1:16) [BENGEL].”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.