The interpretation timeline
Isaiah 35:8 Douay-Rheims

And a path and a way shall be there, and it shall be called the holy way: the unclean shall not pass over it, and this shall be unto you a straight way, so that fools shall not err therein.

1105 – 1875 8 witnesses

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“And there shall be a highway for the travelers. no unclean one shall traverse it No unclean one shall traverse that road; i.e., it will no longer belong to the heathens ([mss.:] nations). and it shall be for them And that is the road of those blind, deaf, lame, and mute mentioned above. They shall travel on this road, and even if they are fools, they shall not go astray, for I will straighten it for them.”
Source
1167
A.D.
Ibn Ezra Jewish
1089–1167
“And an highway shall be there, etc. Although the rivers shall swell, still there will be a pathway, etc. מסלול An highway. The way of holiness. So called because of the return of the Israelites to Jerusalem. The unclean shall not pass, etc. No heathen, that is unclean, will pass over it, although it is his own, out of fear: the redeemed alone shall walk on the highway; and furthermore, the wayfaring men, and fools, that are not acquainted with the way, shall not err therein, because it will be a highway.”
Source
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
1771
A.D.
John Gill Reformed
1697–1771
“And an highway shall be there, and a way,.... Not two ways, but one; the way shall be a highway, a way cast up, raised, and "elevated" (y); this is to be understood principally of Christ, the only way of life and salvation; and of the lesser paths of duty and ordinances: and the meaning is, that in those desert places, where Christ and his Gospel had not been preached, at least for many ages, here he should be made known, as the way, the truth, and the life; his Gospel preached, and his ordinances administered; and multitudes, both of Jews and Gentiles, should be directed and enabled to walk here. Christ is a highway to both; a way cast up by sovereign grace, which is raised above the mire and dirt of sin, and carries over it, and from it; a way visible and manifest, clearly pointed to and described in the everlasting Gospel; it is the King's highway, the highway of the King of kings, which he has ordered and appointed, and is common to all his subjects, high and low, rich and poor, stronger or weaker believers, all may walk in this way; it is an old beaten path, which saints in all ages, from the beginning of the world, have walked in; it is the good old way, the more excellent, the most excellent one; all obstructions and impediments are removed, cast in by sin, Satan, the law, and the world; nor is anyone to be stopped and molested in this way, and all in it shall come safe to their journey's end: and it shall be called The way of holiness; or, "a holy way" (z); Christ is perfectly holy in nature and life, and the holiness of both is imputed to those that are in this way; all in this way are sanctified by the Spirit and grace of God; this way leads to perfect holiness in heaven, and none but holy persons walk here: salvation by Christ no ways discourages the practice of holiness, but is the greatest motive and incentive to it. Christ leads his people in paths of righteousness; in the paths of truth, of ordinances, and of worship, public and private, all which are holy; and in the path of Gospel conversation and godliness: this way is so holy, that the unclean shall not pass over it; all men are unclean by nature; some are cleansed by the grace of God and blood of Christ; and though, as sanctified, they are not free from sin and the pollution of it, yet, as justified, they are "the undefiled in the way"; and none but such can pass over, or pass through this way to heaven, Rev 21:27, but it shall be for those; for holy men, not for the unclean; for Israel only, as Kimchi, for such who are Israelites indeed; for those who are before mentioned, Isa 35:5 as Jarchi; it is for those to walk in who have been blind, but now see, and these are led in a way that they knew not before; for the deaf, who now hear the voice behind them, saying, this is the way; for the lame man, that leaps like a hart, to walk and run in; for the dumb, now made to sing, and go on in it rejoicing; it is for the redeemed to walk in, as in the following verse. This clause may be rendered, "and he shall be with them" (a); that is, God shall be with them; they shall have his company and gracious presence in the way; he will be with them, to guide and direct them, to supply all their wants, and furnish them with everything convenient for them; to support and strengthen them, on whom they may lean and stay themselves; to guard and protect them from all their enemies; and being with them they shall not miss their way, or fail of coming to the end. Hence it follows, the wayfaring men, though fools, shall not err therein; or travellers; such the saints are, they are strangers, pilgrims, and sojourners here; they have no continuance here; they are like wayfaring men, that abide but for a night; they are bound for another country, a better, even a heavenly one, and at last shall arrive thither: now these, though they have been "fools" in their unregenerate state, with respect to spiritual things; or though they may not have that sharpness of wit, and quickness of natural parts, as some men have; and though they may not have that clear and distinct knowledge of Gospel truths as others, at least of some of them, yet shall not err as to the way of salvation; and though they may err or mistake in some things, yet not in the main, not fundamentally, nor finally; the way of salvation by Christ is so plain a way, that he that has any spiritual understanding of it shall not err in it. (y) "semita strata", Montanus; "vel exaltata lapidibus", Vatablus. (z) "via sancta", V. L. Piscator. (a) "sed ipse illis ambulator vise" De Dieu; "ipse cum eis", Tigurine version.”
Source
1849
A.D.
1774–1849
“Way, leading to Jerusalem. Idolaters, &c., shall not be there, chap. lii. 1. This was only verified (Calmet) in the Catholic Church, where, though some wicked may be found, the truth still prevails; and holiness can be obtained no where else. (Haydock) — This Church is unspotted, Ephesians v. 27. (Calmet) — Fools. The most simple may learn what is necessary for salvation, (Menochius) which will never be done by consulting Scripture alone. (Haydock)”
Source
1863
A.D.
1796–1863
“The way is truly holy. The unclean do not pass over it; for. although many sinners profess the way of holiness, they fail to walk in it. The enemy of man can never get possession of it, by corrupting the teaching or worship of the church.”
1871
A.D.
1871
“highway--such a causeway (raised way, from a Hebrew root, "to cast up") as was used for the march of armies; valleys being filled up, hills and other obstructions removed (Isa 62:10; compare Isa 40:3-4). way of holiness--Hebraism for "the holy way." HORSLEY translates, "the way of the Holy One;" but the words that follow, and Isa 35:10, show it is the way leading the redeemed back to Jerusalem, both the literal and the heavenly (Isa 52:1; Joe 3:17; Rev 21:27); still Christ at His coming again shall be the Leader on the way, for which reason it is called, "The way of the Lord" (Isa 40:3; Mal 3:1). it shall be for those: the wayfaring men--rather, "He (the Holy One) shall be with them, walking in the way" [HORSLEY]. though fools--rather, "And (even) fools," that is, the simple shall not go astray, namely, because "He shall be with them" (Mat 11:25; Co1 1:26-28).”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“In the midst of such miracles, by which all nature is glorified, the people of Jehovah are redeemed, and led home to Zion. "And a highway rises there, and a road, and it will be called the Holy Road; no unclean man will pass along it, as it is appointed for them: whoever walks the road, even simple ones do not go astray. There will be no lion there, and the most ravenous beast of prey will not approach it, will not be met with there; and redeemed ones walk. And the ransomed of Jehovah will return, and come to Zion with shouting, and everlasting joy upon their head: they lay hold of gladness and joy, and sorrow and sighing flee away." Not only unclean persons from among the heathen, but even unclean persons belonging to Israel itself, will never pass along that holy road; none but the church purified and sanctified through sufferings, and those connected with it. למו הוּא, to them, and to them alone, does this road belong, which Jehovah has made and secured, and which so readily strikes the eye, that even an idiot could not miss it; whilst it lies to high, that no beast of prey, however powerful (perı̄ts chayyōth, a superlative verbal noun: Ewald, 313, c), could possibly leap up to it: not one is ever encountered by the pilgrim there. The pilgrims are those whom Jehovah has redeemed and delivered, or set free from captivity and affliction (גּאל, לג, related to חל, solvere; פּדה, פד, scindere, abscindere). Everlasting joy soars above their head; they lay fast hold of delight and joy (compare on Isa 13:8), so that it never departs from them. On the other hand, sorrow and sighing flee away. The whole of Isa 35:10 is like a mosaic from Isa 51:11; Isa 61:7; Isa 51:3; and what is affirmed of the holy road, is also affirmed in Isa 52:1 of the holy city (compare Isa 62:12; Isa 63:4). A prelude of the fulfilment is seen in what Ezra speaks of with gratitude to God in Ezr 8:31. We have intentionally avoided crowding together the parallel passages from chapters 40-66. The whole chapter is, in every part, both in thought and language, a prelude of that book of consolation for the exiles in their captivity. Not only in its spiritual New Testament thoughts, but also in its ethereal language, soaring high as it does in majestic softness and light, the prophecy has now reached the highest point of its development.”
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.