The interpretation timeline
Isaiah 50:7 Douay-Rheims

The Lord God is my helper, therefore am I not confounded: therefore have I set my face as a most hard rock, and I know that I shall not be confounded.

A.D. 407 – 1875 8 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“For the railings, and insults, and reproaches and gibes inflicted by enemies and their plots are compared with a worn-out garment and moth-eaten wool when God says, "Do not fear the reproach of people, neither be afraid of their revilings, for they shall grow old as does a garment, and like moth-eaten wool so shall they be consumed." Therefore, let none of these things that are happening trouble [you], but stop asking for the aid of this or that person and running after shadows (for such are human alliances); persistently call on Jesus, whom [you serve] … and in a moment of time all these evils will be dissolved.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“But the Lord God helps me if they rise up against me.”
1167
A.D.
Ibn Ezra Jewish
1089–1167
“I shall not be ashamed. God will fulfil all the words prophesied by me.”
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“Thus says the Lord: Who is this, etc. Here he begins to remove the impediments to liberation: and first he removes the impediments; second he applies remedies, chapter 53: Who has believed the report, etc. Concerning the first he removes three impediments. First, the lack of divine benefits; second, the rejection of persons, chapter 51: Hear me, you who follow, etc.; third, the poverty of things, chapter 52: Arise, arise, etc. Concerning the first, three things. First he excludes the impediment; second he sets himself forth as an example: The Lord has given me, etc.; third he concludes with wholesome counsel: Who among you that fears, etc. Concerning the first, two things. First he excludes the lack of divine benefits on the part of the divine will, second on the part of the divine power: Is it shortened, etc. Concerning the first, three things. First he excludes a defect of the divine will, as though God of himself did not wish to do good, excluding a twofold manner of alienation: namely, the manner of putting away a wife, which was by a bill of divorce, as is said in Deuteronomy 24, which indeed was permitted to them on account of the hardness of their heart, Matthew 19: Who is this, etc. But against this, Jeremiah 3: because she had committed adultery, etc. And it must be said that the Lord, as far as is in himself, did not repudiate them; but they, through their own sins, forsook God. He also excludes the manner of alienating a possession: Or who is the creditor, etc., as if to say: you who are my inheritance. Above, 19: I should have sold to him, not having anything else to pay — whence it is clear that, since I have not alienated you from my lordship, I am prepared to do good as far as it is in me. Second, he shows the sin of the human will: For behold, in iniquities — Romans 7: For I am a carnal man, sold under sin. Third, he sets forth an argument: because I came, through inspiration; I called, through the prophets. Proverbs 1: I called, and you refused. Is it shortened? Here he excludes the defect on the part of the divine power, excluding first a defect of power: shortened, as though I could not even subject those far off to myself; small, against powers. Below, 59: Behold, the hand of the Lord is not shortened. Second, he sets forth a sign of the divine power: Behold. First in the waters: in rebuke, that is, at command, I will do it, if I will, just as I did at the going out of Israel from Egypt, Exodus 14; I will make rivers, as the Arnon, Numbers 21, and the Jordan, Joshua 4; they will rot, as in Exodus 7, when the waters were turned into blood. Psalm 105: He rebuked the Red Sea, and it was dried up. Second, he shows signs of his power in the heavens: I will clothe the heavens — the airy ones — with darkness, as in Egypt, Exodus 10. Psalm 146: Who covers the heaven with clouds. The Lord has given. Here he sets himself forth as an example: and first as to the grace of the benefit received; then as to eloquence — a learned tongue, to sustain, with encouragements: Job 4: they strengthened the wavering; then also as to wisdom — he raises up, to attend, in the morning, from the beginning of my preaching, or from the beginning of my age. Or because at that time he was accustomed to pray, Psalm 62: In the mornings I will meditate on you. He has opened, for understanding, Psalm 84: I will hear what the Lord God speaks in me. Matthew 23: One is your master, Christ. Second, he sets himself forth as an example as to obedience, setting forth perfect obedience: But I do not contradict — rather I receive, and I accept his inspiration; I did not go backward, from a good purpose. Above, 45: Woe to him who contradicts his maker. He also sets forth the constancy of obeying, because he did not give up obedience for any danger: I have given my body; that is, I exposed myself to suffer such things. Or perhaps he suffered these things literally; but it was fully fulfilled in Christ, Matthew 26 and 27. Jeremiah 12: I have given my beloved soul into the hands of enemies. Third, he sets himself forth as an example as to the confidence which he had in God, first setting forth a ready defense: The Lord God is a helper — Jeremiah 20: The Lord is with me like a strong warrior. Second, the security of that confidence: and he set me, that I might not be moved by fear or shame. Ezekiel 3: I have made you like adamant and flint. Third, he assigns the reason for the security from the power of the one helping: Near is he who justifies, namely, God. Who will contradict? By words. Let us stand together. Job 17: Set me, Lord, next to you, and let anyone's hand fight against me. Adversary — by deeds. Let him condemn — by false judgments. Romans 8: God who justifies, who is it that condemns? Again, from the weakness of the one attacking: Behold, all of them like a garment — by old age, in which there is a natural defect; the moth, in which there is violence. Job 13: who am to be consumed like rottenness, and like a garment that is eaten by a moth. As if he were to say: from all these things, just as I, after having received benefits, obey God and trust in him, so also you. Who among you? Here he concludes, from his own example, a wholesome counsel: and first he sets forth the counsel; second he sets forth the contempt of the counsel: Behold, all of you. Now he gives counsel that they should trust in God: whence he does three things. First he requires the fitness of those who trust, which is from fear and obedience — servant, of Isaiah, or of whatever other. Psalm 24: Who is the man who fears the Lord? Second he shows the necessity of confidence: who has walked in darkness — of error, or of adversity. John 11: He who walks in the night stumbles. Third he sets forth the counsel itself: let him hope in the name; above, 10: the remnant of Israel, etc. Behold, all. Here he sets forth the contempt of the counsel, setting forth three things. First the fault: kindling — by your sins — a fire, meriting it for yourselves; girded — as though bound in your sins, or made ready for sin. Above, 1: your strength shall be as the ash of tow. Second he sets forth the punishment: walk — as if he were to say, receive the punishment. Psalm 9: The sinner is caught in the labors of his own hands. Third he sets forth the power of the one punishing: from the hand, namely, of the power of God. You shall sleep — the sleep of death. Note, on that word, you are sold in iniquities, that man sells many things for sin. First, the virtue of the soul: Lamentations 1: They gave up all their precious things for a vile price. Second, the heavenly inheritance: 3 Kings 21: The Lord be merciful to me, that I should not sell the inheritance of my fathers. Third, the liberty of the soul: Ecclesiasticus 10: Nothing is more wicked than to love money. Fourth, the honor of divine love: Hosea 3: the Lord loves. Also, on that word, But I do not contradict, note that men contradict God: first, the unfaithful contradict the divine truth. Ecclesiasticus 4: Do not contradict the word of truth. Second, the impatient contradict the divine correction. Job 9: who contradicts him? etc. Third, the impenitent contradict the divine goodness. Above, 41: and they shall be as if they were not. Fourth, the disobedient contradict the divine authority. Hosea 4: your people. Also, on that word, you shall sleep in sorrows, that sinners grieve in death. First, on account of the loss of bodily things: Job 27: When the rich man shall sleep, he shall carry nothing with him. Second, on account of the contradiction of conscience: Wisdom 5: doing penance, and groaning for anguish of spirit. Third, on account of despair of future glory: Lamentations, last chapter: The crown has fallen from our head. Woe to us, for we have sinned. Fourth, on account of fear of punishment: Psalm 47: There sorrows as of a woman in labor, etc.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“For the Lord God will help me,.... As he promised he would, and did, Psa 89:21, which is no contradiction to the deity of Christ, nor any suggestion of weakness in him; for he is the true God, and has all divine perfections in him; is equal to his Father in power, as well as in glory, and therefore equal to the work of redemption, as his other works show him to be; but this is to be understood of him as man, and expresses his strong faith and confidence in God, and in his promises as such; and in his human nature he was weak, and was crucified through weakness, and in it he was made strong by the Lord, and was held and upheld by him: and this shows the greatness of the work of man's redemption, that it was such that no mere creature could effect; even Christ as man needed help and assistance in it; and also the concern that all the divine Persons had in it: therefore shall I not be confounded; or "made ashamed" (z); though shamefully used, yet not confounded; so as to have nothing to say for himself, or so as to be ashamed of his work; which is perfect in itself, and well pleasing to God: therefore have I set my face like a flint: or like "steel" (a); or as an adamant stone, as some (b) render it; hardened against all opposition; resolute and undaunted; constant and unmoved by the words and blows of men; not to be browbeaten, or put out of countenance, by anything they can say or do. He was not dismayed at his enemies who came to apprehend him, though they came to him as a thief, with swords and staves; nor in the high priest's palace, nor in Pilate's hall, in both which places he was roughly used; nor at Satan, and his principalities and powers; nor at death itself, with all its terrors. And I know that I shall not be ashamed, neither of his ministry, which was with power and authority; nor of his miracles, which were proofs of his deity and Messiahship; nor of his obedience, which was pure, and perfect, and pleasing to God; nor of his sufferings, which were for the sake of his people; nor of the work of redemption and salvation, in which he was not frustrated nor disappointed of his end. (z) "non erubui", Pagniuus, Montanus; "non afficior ignominia", Junius & Tremellius, Piscator; "non pudefactus", Syr. (a) "at chalybem". Forerius. (b) "Tanquam saxum adamantinum", Junius & Tremellius, Piscator.”
Source
1849
A.D.
1774–1849
“Rock. Christ heard the accusations of his enemies unmoved, as he had not been afraid to blame the conduct of the Pharisees.”
1871
A.D.
1871
“Sample of His not being "discouraged" (Isa 42:4; Isa 49:5). set . . . face like . . . flint--set Myself resolutely, not to be daunted from My work of love by shame or suffering (Eze 3:8-9).”
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“But no shame makes him faint-hearted; he trusts in Him who hath called him, and looks to the end. "But the Lord Jehovah will help me; therefore have I not suffered myself to be overcome by mockery: therefore did I make my face like the flint, and knew that I should not be put to shame." The ו introduces the thought with which his soul was filled amidst all his sufferings. In נכלמתּי לא he affirms, that he did not suffer himself to be inwardly overcome and overpowered by kelimmâh. The consciousness of his high calling remained undisturbed; he was never ashamed of that, nor did he turn away from it. The two על־כּן stand side by side upon the same line. He made his face kachallâmı̄sh (from châlam, related to gâlam in Isa 49:21, with the substantive termination ı̄sh: see Jeshurun, p. 229), i.e., he made it as unfelling as a flint-stone to the attacks of his foes (cf., Eze 3:8-9). The lxx renders this ἔθηκα τὸ πρόσωπον μου ὡς στερεὰν πέτραν; but ἐστήριξα τὸ πρός, which is the rendering given to פני שׂים in Jer 21:10, would have been just the proper rendering here (see Luk 9:51). In "holy hardness of endurance," as Stier says, he turned his face to his antagonists, without being subdued or frightened away, and was well assured that He whose cause he represented would never leave him in the lurch.”
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.