The interpretation timeline
Isaiah 35:4 Douay-Rheims

Say to the fainthearted: Take courage, and fear not: behold your God will bring the revenge of recompense: God himself will come and will save you.

A.D. 220 – 1871 7 witnesses

Patristic

before A.D. 750
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“The actions of Christ must be seen alongside the rule of the Scriptures. Unless I am mistaken, we see that Christ's work consisted of two actions: preaching and power. Let us look at each of these in the order we have just listed them. First, Christ was announced as a preacher. Isaiah said, "Cry out loud, and do not hold back. Lift up your voice as a trumpet, and declare to my people their crimes and to the house of Jacob their sins. Then seek me day by day and desire to learn my ways, as a nation that has done righteousness and has not forsaken the judgment of God," and so forth. Second, it was announced that Christ would do acts of power from the Father. Isaiah said, "Behold, our God will come with judgment; he will come and save us. Then the sick will be healed, the eyes of the blind will see, the ears of the deaf will hear, the mute will speak, and the lame will leap as a deer."”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“This is the divine arrangement, as far as any human being can investigate it, better minds in a better way, lesser minds less effectively; this divine arrangement is giving us hints of a great and significant mystery. Christ, you see, was going to come in the flesh, not anyone at all, not an angel, not an ambassador; but "he himself will come and save you." It wasn't anyone who was going to come; and yet how was he going to come? He was going to be born in mortal flesh, to be a tiny infant, to be laid in a manger, wrapped in cradle clothes, nourished on milk; going to grow up, and finally even to be done to death. So in all these indications of humility there is indeed a pattern of an extreme humility.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“to the hasty of heart Who hurry the redemption and are troubled by its delay. [with] vengeance He shall come (lit., vengeance He shall come,) with vengeance He shall come. the recompense of God Upon the wicked ([mss.] upon your enemies) He shall come and save you.”
1167
A.D.
Ibn Ezra Jewish
1089–1167
“To them that are of a fearful heart. To those that do not believe that such a miracle could happen. With vengeance against Edom or Assyria.”
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“The desert shall rejoice, etc. In this part he sets down the effect of the prosperity following upon the Jews from the destruction of their enemies: and it is divided into two. In the first is set down a consoling promise; in the second an encouraging exhortation, "Strengthen ye the hands," etc. Concerning the first, three things. First he sets down the gladness of men, which he compares to a flowering meadow, which is also called laughing, and which indeed has beauty in its flower: hence he says: "the desert," that is, the land of the Jews, which before, the Assyrians laying it waste, was of this kind — by metonymy, that is, the men themselves — "like the lily," which is the most beautiful flower, and lasts long. Ecclesiasticus 39: "flourish, ye flowers," etc.; it has also beauty in the bud: hence he says, "budding," etc., Proverbs 11: "the just as one flourishing," etc.: for as the bud comes from the flower, so exterior gladness comes from the joy of the heart. Secondly he promises the fertility of the land: "the glory of Lebanon," etc., that is, the fertility of diverse things, which is the glory of these places, will be in the land of promise. Hosea, last chapter: "he shall be as the olive tree," etc. Thirdly, the nearness of both: "themselves," that is, it will not be deferred to the times of the sons. Above, 33: "the king in his beauty," etc. Strengthen ye. Here is set down the encouraging exhortation: and concerning this three things. And first is set down the injunction of the office for exhorting: "strengthen ye the hands," in which is weakness for working; "the trembling knees," in which is weakness for sustaining. Hebrews 12: "the hands that hang down," etc. Secondly is set down the encouragement itself: "say to the faint-hearted," etc. Luke 12: "fear not, little," etc. Thirdly the reason for the encouragement is assigned: and first as to the removal of evils, by freeing from enemies, "behold your God"; Deuteronomy 32: "the blood of the servants," etc.; and by healing from infirmities, "then shall be opened." And these are metaphorical expressions, if they are referred to the time after the destruction of the Assyrians, so that spiritual defects are understood, as above. Or literally, if they are referred to the coming of Christ in the flesh, as is said Matthew 11: "the blind see," etc. Secondly as to the conferring of four goods. First as to the abundance of waters, because "the waters are broken" (metaphorically) for consolations. Or because it will rain much, so that there is great fertility. Psalm 106: "he turned the desert into pools," etc. Secondly the beauty of the fields: "in the dens," that is, the land, which before was desert, so that these animals might dwell there, will be cultivated. "The green of reed and rush," which arise in green places. Job 40: "he sleeps under the shadow," etc. Thirdly as to the restoration of the ways, setting down the holiness of the way: "and there shall be there," in the land of Judah, a path leading to the temple. "The polluted," the gentile, as before. Or mystically, concerning the Church militant or triumphant. Apocalypse 21: "there shall not enter into it," etc.; he also sets down its straightness: "and this shall be"; "the foolish," that is, however simple, shall not err, because of the multitude of those passing by. Jeremiah 31: "I will bring them by the torrents," etc.; he also sets down the security of the way: "there shall not be there," etc. Above, 11: "they shall not hurt nor kill," etc.; and he sets down the frequenting of the ways: "and the redeemed," etc., from the aforesaid dangers. Baruch 4: "behold, thy sons come," etc. Fourthly he promises them the gladness of hearts: "everlasting gladness." Above, 25: "he shall take away the tear," etc.; is also shown the condition of the gladness of the saints in the fatherland: that it is everlasting; that it is full, "they shall obtain"; that it is pure, "sorrow shall flee." Apocalypse 21: "God shall wipe away every tear," etc. The saints are compared to lilies: because of the height of the stem, from which comes constancy in adversities. Canticle 2: "as the lily among thorns," etc.; because of the sweetness of scent, from which comes good fame. Ecclesiasticus 39: "flourish, ye flowers, as the lily," etc.; because of the greenness of its moisture, from which comes strength of mind. Ecclesiasticus 50: "as lilies by the course of water." Because of connection, from which comes the charity of the saints. Canticle 7: "thy belly is like," etc. These lilies, Christ: he clothes them as to the gifts of the virtues. Matthew 6: "consider the lilies of the field," etc.; he gathers them unto eternal rewards. Canticle 6: "my beloved is gone down into the garden," etc.; he rests in them through good pleasure. Canticle 2: "my beloved to me," etc.; and therefore he himself the lily. Canticle 2: "I am the flower of the field," etc.”
Source

Post-Reformation

c. 1650 – 1900
1849
A.D.
1774–1849
“Recompense. Christ will satisfy the justice of his Father. (Haydock) — He will redeem the world, and refute the false interpretations of the Bible. (Calmet) — He will bring the devil into subjection. (Menochius)”
1871
A.D.
1871
“fearful--"hasty," Margin; that is, with a heart fluttered with agitation. with--the Hebrew is more forcible than the English Version: "God will come, vengeance! even God, a recompense!" The sense is the same.”
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.