The interpretation timeline
Isaiah 41:8 Douay-Rheims

But thou Israel, art my servant, Jacob whom I have chosen, the seed of Abraham my friend:

A.D. 99 – 1875 7 witnesses

Patristic

before A.D. 750
99
A.D.
Clement of Rome Patristic
d. A.D. 99
“Abraham, styled "the friend," [Isaiah 41:8] was found faithful, inasmuch as he rendered obedience to the words of God. He, in the exercise of obedience, went out from his own country, and from his kindred, and from his father's house, in order that, by forsaking a small territory, and a weak family, and an insignificant house, he might inherit the promises of God. For God said to him, "Get you out from your country, and from your kindred, and from your father's house, into the land which I shall show you. And I will make you a great nation, and will bless you, and make your name great, and you shall be blessed. And I will bless them that bless you, and curse them that curse you; and in you shall all the families of the earth be blessed." [Genesis 12:1-3] And again, on his departing from Lot, God said to him, "Lift up your eyes, and look from the place where you now are, northward, and southward, and eastward, and westward; for all the land which you see, to you will I give it, and to your seed forever. And I will make your seed as the dust of the earth, [so that] if a man can number the dust of the earth, then shall your seed also be numbered." [Genesis 13:14-16] And again [the Scripture] says, "God brought forth Abram, and spoke unto him, Look up now to heaven, and count the stars if you are able to number them; so shall your seed be. And Abram believed God, and it was counted to him for righteousness." [Genesis 15:5-6] On account of his faith and hospitality, a son was given him in his old age; and in the exercise of obedience, he offered him as a sacrifice to God on one of the mountains which He showed him. [Genesis 22:9]”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“But you, Israel My servant and I am obliged to help you. The end of this sentence is (infra 10): “Do not fear.” This appears to me to be the sequence of the section according to its simple meaning. But the Midrash Aggadah in Gen. Rabbah 44:7 expounds the entire section as alluding to Malchizedek and Abraham. [5] Islands saw the war and feared. Shem [Malchizedek] feared Abraham, lest he say to him, You begot these wicked men in the world. And Abraham feared Shem, since he slew his sons, the people of Elam, who was descended from Shem. islands Just as the islands of the sea are distinguished and recognized in the sea, so were Abraham and Shem distinguished in the world. [6] Each one aided his fellow This one [Shem] aided this one [Abraham] with blessings, “Blessed be Abram” (Gen. 14:19), and this one [Abraham] aided this one [Shem] with gifts, “And he gave him tithe from everything” (ibid. verse 20). [7] And the craftsman strengthened This is Shem, who was a blacksmith, to make nails and bars for the ark. the smith This is Abraham, who purified (צוֹרֵף) the people, to bring them near to God [lit. to Heaven]. the sledge hammer This is Abraham, who smote (הָלַם) all these kings at one time. He says of the cement Heb. דֶּבֶק. The nations said, It is good to cleave to this one’s God [rather than to Nimrod’s idols]. And he strengthened him Shem strengthened Abraham to cleave to the Holy One, blessed be He, and not to move. [8] And you, Israel My servant Abraham, who was not descended from righteous men—I did all this for him, and you, Israel My servant, who belong to Me by dint of two forefathers. the seed of Abraham, who loved Me who did not recognize Me because of the admonition and the teaching of his fathers, but out of love.”
Source
1167
A.D.
Ibn Ezra Jewish
1089–1167
“But thou, Israel, etc. Those are worshippers of idols, says the prophet, but thou, Israel, art my servant; the name of Abraham is mentioned here, because he also was taken out from the midst of idolaters. אהבי Who loved me. It is not the same as אהובי who is loved by me, the former being active, the latter passive.”
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“"Let them be silent before me," etc. Here he begins to strengthen them toward a firm expectation, from the love of the God who promises. And it is divided into three parts. In the first he shows divine love from the benefits which he showed to the fathers; in the second, from the son whom he promised them, chapter 42: "Behold my servant," etc.; in the third, through the consolations which he foretells amid various distresses, chapter 43: "And now thus says the Lord," etc. Now by the benefits previously bestowed he intends the strengthening of the Jews and the refutation of the idols, which did not show such things to their worshippers; and therefore the first part is divided into two. In the first he disputes against the worshippers of idols; in the second against the idols themselves, at "Come near," etc.; the first into two: for first, by the benefits bestowed on the Jews, he convicts the adversaries; second, by the same he strengthens the Jews, "And you, Israel, my servant," etc. Concerning the first, three things. First he summons the nations to judgment, pursuing the order of judgment, that being silent they may hear, and thus respond. "Let them renew their strength," that is, let them strengthen themselves as if renewed in strength to dispute with me. Micah 6: "Let the mountains hear the judgment," etc. Second he recounts the benefit that was shown, "who called," where he recounts the multitude of benefits: as to the divine election, "from the east," namely Chaldea; "the just one," Abraham. Genesis 12, Job 23: "he has followed his steps," etc., Jeremiah 13: "as a girdle cleaves," etc., Hosea 9: "like the first fruits of the fig tree," etc.; as to the power granted, "he will give in his sight," namely when he freed Lot, fighting against four kings: Genesis 14. Psalm 1: "not so the wicked, not so," etc.; as to the ease of carrying it out, "he will pass in peace," that is, without labor; "the path," etc., as one who walks lightly, as it were leaving no trace of the way; or because the labor is in the feet, no sign of the way is left behind. Above, 40: "they shall run, and not labor," etc.; he seeks the author: "who has wrought this," and "who," calling, by eternal foreknowledge, below, 49: "the Lord from the womb," etc.; and he gives the response: "I the Lord," etc., Apocalypse 1: "I am Alpha," etc. Otherwise, according to the letter, it is expounded of Cyrus; mystically, of Christ. Third, he sets forth, as it were, the response of the Gentiles, in which they believed they could defend themselves by means of idols. And first he touches on their astonishment at the things alleged or the wonders seen, "the islands saw," etc., Psalm 76: "the waters saw you, O God," etc.; "they drew near," to resist. Second, he sets forth their mutual encouragement, "each one," etc., Job 40: "one shall cleave to another," etc. Third, he sets forth the fabrication of idols: "the one striking will strengthen," the iron with the hammer, he was forging, he was shaping the figure of the idol; saying of the glue, "it is good," for consolidating the idol: Wisdom 13: "setting it on the wall," etc. "And you, Israel," etc. In this part he strengthens the Jews from these same benefits: and first there is set forth the repetition of the past benefit in the election of the fathers Jacob and Abraham, by which they were universally distinguished from others: "Jacob whom," etc., Psalm 104: "the seed of Abraham his servant," etc., Romans 11: "but according to the election," etc. Second, there is set forth the promise of future things: and first as to immunity from evils, excluding fear: both on account of God's presence, "do not fear, because," etc., Jeremiah 1: "do not fear before the face," etc.; and on account of the justice of the fathers, "he has taken you up," as the promised seed, "of my just one," Abraham. Or "he has taken up," to defend, "the just one," Cyrus. Psalm 90: "in their hands they shall bear," etc.; setting forth also the removal of enemies as to their confusion, "behold they shall be confounded." Jeremiah 17: "let them be confounded who persecute me," etc.; as to destruction, "they shall be as if they were not." Above, 30: "to bring the nations to nothing," etc.; and the impossibility of restoration, "you shall seek them," etc., Psalm 36: "I saw the wicked, above," etc.; showing also the reason for the destruction, "because I the Lord," etc., Psalm 143: "send forth your hand," etc. Second, as to the abundance of goods: and first against servitude, setting forth the very yoke of servitude: "fear not, worm"; as one who is held vile and trodden upon like a worm, and reckoned as dead. Psalm 21: "I am a worm," etc.; setting forth also the divine help. Below, 41: "I have helped," etc.; setting forth also the benefit of exaltation, as to the subjugation of enemies, "I have set you," etc., above, 25: "and Moab shall be threshed," etc., which perhaps refers to the time of the Maccabees. And as to their exultation, "and you shall exult," etc., Canticle 1: "we shall rejoice and exult," etc. Second, against poverty, setting forth first the hardship of poverty, "the needy and the poor," etc., above, 5: "her nobles have perished," etc.; second, the divine purpose: "I the Lord," etc., Psalm: "he shall call upon me and I," etc.; third, he sets forth the benefit as to the abundance of waters in mountainous places: "I will open on the heights," etc., above, 30: "there shall be upon the mountain," etc.; and in desert places, "I will make a desert," that is, your land, previously deserted. Psalm 106: "he has turned the desert into pools," etc.; and as to the beauty of the trees, "I will give in the wilderness," etc., Ezekiel 30: "the plantations have multiplied," etc.; fourth, he sets forth the fruit of the benefit, "that they may see," etc., Ecclesiasticus 36: "let them know that there is no God," etc. "Come near," etc. Here he sets forth the dispute against the idols themselves: and first he sets forth the dispute; second, the determination of the sentence, "and I saw, and there was not," etc. Concerning the first, two things. First he disputes against the idols with universal arguments; second, by an argument taken from a certain particular deed, "I have raised up," etc. Concerning the first, three things. First he summons them to judgment: "come near," that is, draw near to me, that we may be judged together — you idols, or idolaters; "bring forth," that is, allege, if you have anything, that you may prove yourselves gods; "if you have something to say," etc., Psalm 81: "God has stood in the assembly," etc. Second, he proposes a twofold argument. One taken from divine knowledge, which fully knows all things, past and future, which the idols do not have: "the former things, what they were," etc. Ecclesiasticus 23: "to the Lord God before they were created," etc.; the other is taken from divine power, which can punish and do good: "also do good," etc., Baruch, last chapter: "nor if they suffer any evil," etc. Third, he concludes their defect: as to the material cause, "behold you," idols, are from nothing, from created matter; as to the formal cause, "a work," that is, an artificial form, which fashions in you a divinity that is not; and as to the efficient cause, "an abomination," that is, abominable — or: "you," the craftsmen; "your work," namely the idols; "who chose," the worshippers. 1 Corinthians 8: "we know that an idol," etc., Jeremiah 10: "every craftsman is confounded," etc. "I have raised up." Here he takes up a certain special deed to argue against the idols, and first he foretells a certain future thing: "from the north," the Chaldean; "from the east," the Persian, who subjugated to themselves various lands and princes. "Plastes," that is, the potter; "plasma," the thing formed. Mystically: by him who is from the north, the Gentile; by him who is from the east, Christ. Psalm 17: "as the mire of the streets," etc. Second, from this, under a question, he proposes the argument: that he who can foretell this is justly to be called God; and he who cannot, is not. "Who has announced it?" Below, 48: "assemble yourselves and hear," etc. Third, he excludes from the idols any indication of divinity: "there is none announcing," any among you gods; nor, any of the worshippers, "hearing," etc., Psalm 113: "they have eyes, and shall not see," etc. Fourth, he shows in the true God the sign of divinity. "The first," that is, our singular God. "Behold I am present," in help, the Evangelists, announcing future things. Daniel 2: "truly your God is God," etc.; or "the first," the prophet of the Lord, in the person of God; or "the first": the firstborn Son of God. Ephesians 4: "and he gave some indeed," etc. "And I saw." Here, from the dispute set forth above, he concludes the determination of the sentence: and it is evident of itself. Jeremiah 10 and 11: "they are vain, and a work worthy of laughter," etc. (Collationes, chapter 41.) Christ passed over in the peace of flesh to spirit, which he had — Job 5: "you shall know that it has peace," etc.; of man to neighbor, which he taught — below, 52: "how beautiful upon the mountains," etc.; of the world to God, which he made — Ephesians 2: "he made peace," etc. There moves one to preach: the instinct of faith — Psalm: "I believed, therefore," etc., 2 Corinthians 4, Apocalypse, last chapter; the goad of zeal — Jeremiah 20: "and it became in my heart," etc.; the greatness of the reward — Matthew 5: "whoever shall do and teach," etc. Christ took us up as a victor a captive, to set free — Genesis, last chapter: "to the prey, my son," etc.; Psalm: "lead out of custody"; as a physician the sick, to heal — Psalm: "who is merciful to all," etc.; as an advocate the accused, to excuse — 1 John 1: "we have an advocate," etc.; as the strong the weak, to defend — below, 63: "I who speak justice," etc., Exodus: "the Lord will fight," etc.; as a bridegroom the bride, to rejoice together — Hosea 2: "I will espouse you to me," etc. Water: tears poured out — Jeremiah 9: "who will give to my head," etc.; the cleanness of baptism — John 3: "unless one be born again," etc.; spiritual grace — John 7: "he who believes in me, rivers," etc.; divine wisdom — Ecclesiasticus 24: "I, wisdom, have poured forth," etc.; inner joy — Proverbs 5: "drink water," etc.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“But thou, Israel, art my servant,.... As the great spread and success of the Gospel could not fail of drawing the resentment of the idolatrous Heathens on those who embraced and professed it, and by whom they were grievously persecuted under the Roman emperors; wherefore, to support them under these trials, the Lord speaks these and the following comfortable words unto them; for not carnal, but spiritual Israel are here meant; such who by the power of divine grace were turned from idols to serve the living God, who were made willing to become his servants, and whose honour it was to be so called and accounted; and being so, they might be assured their Lord and Master would protect and defend them, bless and reward them: Jacob whom I have chosen; Israelites indeed, Jacob like, plain hearted men, wrestling and prevailing ones in prayer with God, whom he chose to be his people, and peculiar treasure; who, though disallowed of men, were like their Lord and Saviour, chosen of God, and precious: the seed of Abraham my friend: the spiritual seed of Abraham, being believers in Christ, and friends of his, as Abraham was; and whom he uses and shows to be such, by disclosing his secrets to them, Joh 15:15.”
Source
1871
A.D.
1871
“Contrast between the idolatrous nations whom God will destroy by Cyrus, and Israel whom God will deliver by the same man for their forefathers' sake. servant--so termed as being chosen by God to worship Him themselves, and to lead other peoples to do the same (Isa 45:4). Jacob . . . chosen-- (Psa 135:4). my friend--literally, "loving me."”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“The proof adduced by Jehovah of His own deity closes here. But instead of our hearing whether the nations, with which He has entered upon the contest, have any reply to make, the address turns to Israel, upon which deliverance dawns from that very quarter, from which the others are threatened with destruction. "And thou, Israel my servant, Jacob whom I have chosen, seed of Abraham my friend, thou whom I have laid hold of from the ends of the earth, and called from the corners thereof, and said to thee, Thou art my servant, I have chosen and not despised thee; fear thou not, for I am with thee; be not afraid, for I am thy God: I have chosen thee, I also help thee, I also hold thee with the right hand of my righteousness." The ו before ואתּה connects together antitheses, which show themselves at once to be antitheses. Whereas the nations, which put their trust in idols that they themselves had made, were thrown into alarm, and yielded before the world-wide commotions that had originated with the eastern conqueror, Israel, the nation of Jehovah, might take comfort to itself. Every word here breathes the deepest affection. The address moves on in soft undulating lines. The repetition of the suffix ך, with which אשׁר forms a relative of the second person, for which we have no equivalent in our language (Ges. 123, Anm. 1), gives to the address a pressing, clinging, and, as it were, loving key-note. The reason, which precedes the comforting assurance in Isa 41:10, recals the intimate relation in which Jehovah had placed Himself towards Israel, and Israel towards Himself. The leading thought, "servant of Jehovah," which is characteristic of chapters 40-46, and lies at the root of the whole spirit of these addresses, more especially of their Christology, we first meet with here, and that in a popular sense. It has both an objective and a subjective side. On the one hand, Israel is the servant of Jehovah by virtue of a divine act; and this act, viz., its election and call, was an act of pure grace, and was not to be traced, as the expression "I have chosen and not despised thee' indicates, to any superior excellence or merit on the part of Israel. On the contrary, Israel was so obscure that Jehovah might have despised it; nevertheless He had anticipated it in free unmerited love with this stamp of the character indelibilis of a servant of Jehovah. On the other hand, Israel was the servant of Jehovah, inasmuch as it acted out what Jehovah had made it, partly in reverential worship of this God, and partly in active obedience. את־ה עבד, i.e., "serving Jehovah," includes both liturgical service (also עבד absolutely, Isa 19:23) and the service of works. The divine act of choosing and calling is dated from Abraham. From a Palestinian point of view, Ur of Chaldaea, within the old kingdom of Nimrod, and Haran in northern Mesopotamia, seemed like the ends and corners of the earth ('ătsı̄lı̄m, remote places, from 'âtsal, to put aside or apart). Israel and the land of Israel were so inseparably connected, that whenever the origin of Israel was spoken of, the point of view could only be taken in Palestine. To the far distant land of the Tigris and Euphrates had Jehovah gone to fetch Abraham, "the friend of God" (Jam 2:23), who is called in the East even to the present day, chalil ollah, the friend of God. This calling of Abraham was the furthest terminus a quo of the existence of Israel as the covenant nation; for the leading of Abraham was providentially appointed with reference to the rise of Israel as a nation. The latter was pre-existent in him by virtue of the counsel of God. And when Jehovah adopted Abraham as His servant, and called him "my servant" (Gen 26:24), Israel, the nation that was coming into existence in Abraham, received both the essence and name of a "servant of Jehovah." Inasmuch then as, on looking back to its past history, it would not fail to perceive that it was so thoroughly a creation of divine power and grace, it ought not to be fearful, and look about with timidity and anxiety; for He who had presented Himself at the very beginning as its God, was still always near. The question arises, in connection with the word אמּצתּי, whether it means to strengthen (Isa 35:3; Psa 89:22), or to lay firm hold of, to attach firmly to one's self, to choose. We decide in favour of the latter meaning, which is established by Isa 44:14, cf., Psa 80:16, Psa 80:18. The other perfects affirm what Jehovah has ever done, and still continues to do. In the expression "by the right hand of my righteousness," the justice or righteousness is regarded pre-eminently on its brighter side, the side turned towards Israel; but it is also regarded on its fiery side, or the side turned towards the enemies of Israel. It is the righteousness which aids the oppressed congregation against its oppressors. The repeated אף heaps one synonym upon another, expressive of the divine love; for ו simply connects, גּם appends, אף heaps up (cumulat). Language is too contracted to hold all the fulness of the divine love; and for this reason the latter could not find words enough to express all that it desired.”
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.