The interpretation timeline
Isaiah 55:8 Douay-Rheims

For my thoughts are not your thoughts: nor your ways my ways, saith the Lord.

A.D. 407 – 1875 9 witnesses 10 excerpts

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"For my counsels are not as your counsels." … Now if we admit to our favor household slaves when they have offended against us, on their promising to become better, and place them again in their former position and sometimes even grant them greater freedom of speech than before, much more does God act thus. For if God had made us in order to punish us, we might well have despaired and questioned the possibility of our own salvation. But if he created us for no other reason than his own good will, and with a view to our enjoying everlasting blessings, and if he does and contrives everything for this end, from the first day until the present time, what is there which can ever cause us to doubt? Have we provoked him severely, in a way no other person did? This is just the reason why we ought specially to abstain from our present deeds and to repent for the past and exhibit a great change. For the evils we have once perpetrated cannot provoke him so much as our being unwilling to make any change in the future. For to sin may be a merely human failing, but to continue in the same sin ceases to be human and becomes altogether devilish.”
Source
“Do not want to be more merciful than God, or rather, if you wish it, you will not be able, not even in the least degree. How should you? As far as the heaven is from the earth, Scripture says, so far are My counsels from your counsels: and again, If ye, He says, being evil, know how to give good gifts unto your children, how much more your heavenly Father? But in fact this talk is mere pretext and subterfuge. Let us not prevaricate with God's commandments.”
Source
435
A.D.
John Cassian Patristic
c. A.D. 360–435
“God brings salvation to the human race in diverse and innumerable methods and inscrutable ways. He stirs up some, who already want it and thirst for it, to greater zeal, while other even in their resistance, he forces against their will. Sometimes he gives his assistance in the fulfillment of those things which he sees that we desire for our good, while at other times he instills in us the beginnings of holy desire and grants both the beginning of a good work and perseverance in it.… The blessed apostle, reflecting on the manifold bounty of God's providence as he sees that he has fallen into some vast and boundless ocean of God's goodness, exclaims: "O the depth of the riches of the wisdom and knowledge of God! How inscrutable are the judgments of God and his ways past finding out! For who hath known the mind of the Lord?" Whoever then imagines that he can by human reason fathom the depths of that inconceivable abyss, will be trying to explain away the astonishment at that knowledge, at which that great and mighty teacher of the gentiles was awed. For if a person thinks that he can either conceive in his mind or discuss exhaustively the designs of God through which he brings salvation to human beings, he certainly impugns the truth of the apostle's words and asserts with profane audacity that his judgments can be scrutinized and his ways searched out. The Lord also witnesses to this when he says, "For my thoughts are not your thoughts, neither are your ways my ways."”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“For My thoughts are not your thoughts Mine and yours are not the same; therefore, I say to you, “The wicked shall give up his way,” and adopt My way... “and a man of iniquity his thoughts” and adopt My thoughts, to do what is good in My eyes. And the Midrash Aggadah (Tanhuma Buber, Vayeshev 11 explains:) For My thoughts are not, etc. My laws are not like the laws of man [lit. flesh and blood]. As for you, whoever confesses in judgment is found guilty, but, as for Me, whoever confesses and gives up his evil way, is granted clemency (Proverbs 28:13).”
Source
1167
A.D.
Ibn Ezra Jewish
1089–1167
“For my thoughts are not yours. You thought that I should punish you even after your return to me; but your thoughts are not mine; my intention is to do good to you. Neither are your ways my ways. My ways are righteous; comp., Are not my ways equal? are not your ways unequal ? (Ez. 18:19)”
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“This is the inheritance. Here he applies the third remedy, promising an abundance of things against the former want. And it is divided into two parts: in the first he sets down the promise; in the second he shows the firmness of the promise, and how it comes down. Concerning the first he does three things. First he shows the condition of those to whom it is promised: this is the inheritance; that is, these things that follow are owed to the servants of the Lord, who are his sons, as by hereditary right, and by justice, as a just reward. Ps. 15: my inheritance. Second he sets forth the promise, promising a future abundance in necessary things: all you who thirst, that is, you from among the Jews, who before were thirsting on account of want, buy, without price, eat, bread, and other necessary things. John 7: if anyone thirsts, let him come to me and drink (...) and from his belly there shall flow living waters. And in delights: come, buy, as if to say, as though you were buying, receive; or without silver, that is, for less than the just price. Song 5: I have drunk my wine with my milk. And recalling the former want: why do you weigh out? As if to say: why until now did you give silver, and were not able to buy bread with it? Haggai 1: you have sown much, and brought in little. But these things are expounded mystically of the water of divine wisdom, which is given freely to those who thirst, according to the Gloss. Third he enjoins the preparation for obtaining the said promise: hear, you who hear; and first he rouses attention; second he sets down the exhortation, seek the Lord. Now he rouses attention by a threefold promise. First, promising to those who attend a copious enjoyment of good things: eat, that is, I will refresh you with diverse good things, if you hear me, in fatness, as to abundance. Above, ch.1: if you be willing, and will hear me, you shall eat the good things of the land. Jer. 31: the soul of the priests. Second, promising escape from death: incline. Ps. 118: my soul shall live; again Ps. 118: I will never forget your justifications, for by them you have given me life. Third, promising power. And first he sets down a comparison: and I will strike: that is, just as I made true promises to David, that his seed should remain forever, so I will also do with you. Second he explains it, showing what David did: behold, a witness, Ps. 17: a people whom I have not known has served me; at the hearing of the ear they have obeyed me. And what he will do for them: behold, you shall call nations, to fulfill your command, not by your own strength, but on account of the Lord. Above, ch.49: they shall worship, on account of the Lord your God, who has chosen you. Seek the Lord. Here he enjoins on them the preparation for obtaining the said promise: and first he gives the divine counsel of seeking: seek the Lord while he may be found, before adversity or death comes. Ps. 104: seek the Lord, etc. Prov. 1: they shall rise in the morning, etc. Second he teaches the manner of seeking: let the wicked man forsake, he who sins against God; the unjust man, he who sins against his neighbor. Above, ch.1: take away the evil of your thoughts from before my eyes. Third he sets down the fruit of returning, namely mercy: and let him return, for he is great, that is, of manifold mercy, to forgive. Joel 2: turn to the Lord your God. Fourth he excludes the impediment to mercy: for not the thoughts, as if to say: you are wicked, I am merciful; you think of vengeance, I of mercy. Ezek. 18: are not my ways right, O house of Israel, and are not rather your ways wicked? And as. Here he shows the firmness of the promise: and first he shows the efficacy of the divine word: to me void, that is, without fruit. Wisdom 1: an obscure word. Hosea 6: he shall come like the early and the latter rain. Second he sets down its content as to the joyful release from Babylon, for in joy. Ps. 104: he brought forth his people in exultation, and his chosen ones in gladness. As to the congratulation of others: mountains and hills, the powerful and the common people, praising the Lord in you. Or it is a hyperbole. Your land, congratulating your return. As to the multiplied restitution of goods: instead of the brier, that is, the former things were few in respect of the things to come. Haggai 2: the glory of this latter house shall be greater than that of the former. Above, ch.41: I will give in the wilderness. The saliunca, so called from leaping (saliendo), which is called the hare's thistle. Third he sets down the consequent glory of God: and the Lord shall be named, everywhere and always glorious for your liberation, for an everlasting sign, to which they shall flee as to a sign of salvation. Above, ch.49: behold I will lift up my sign to the nations. Note on that word, all you who thirst come to the waters, that divine teaching is first called water; and this, first, because it heals the sick. Ecclus. 15: he gave him to drink the water of wholesome wisdom. Second, because it cleanses the defiled. Ezek. 36: I will pour upon you clean water, and you shall be cleansed from all your filthiness. Third, because it satisfies those who thirst. John 4: whoever shall drink of the water that I shall give him shall not thirst forever. Second it is called wine; and this because, first, it pricks by reproving. Above, ch.1: your wine is mixed with water. Second, because it kindles by exhorting. Ps. 104: the word of the Lord inflamed him. Third, because it inebriates by consoling. Below, at the end: be inebriated with the breasts of your consolation. Third it is called milk; and this, first, on account of beauty. Gen. 49: Naphtali, a hart let loose, giving words of beauty. Second, on account of sweetness. Song 2: let your voice sound in my ears, for your voice is sweet. Third, on account of the ease of taking it. 1 Pet. 2: as newborn babes, desire milk.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“For my thoughts are not your thoughts,.... In some things there may be a likeness between the thoughts of God and the thoughts of men, as to the nature of them: thoughts are natural and essential to them both; they are within them, are internal acts, and unknown to others, till made known; but then the thoughts of men are finite and limited, whereas the thoughts of the Lord are infinite and boundless; men's thoughts have a beginning, but the Lord's have none; though not so much the nature as the quality of them is here intended: the thoughts of men are evil, even the imagination of their thoughts, yea, every imagination is, and that always and only so; but the thoughts of God are holy, as appears from his purposes and covenant, and all his acts of grace, in redemption, calling, and preparing his people for glory: the thoughts of men, as to the object of them, are vain, and nothing worth; their thoughts and sentiments of things are very different from the Lord's, as about sin, concerning Christ, the truths of the Gospel, the people of God, religion, holiness, and a future state, and in reference to the business of salvation; they think they can save themselves; that their own works of righteousness are sufficient to justify them; their privileges and profession such, that they shall be saved; their wisdom, riches, and honour, a security to them from damnation: however, that their sincere obedience, with repentance for what is amiss, will entitle them to happiness: but the thoughts of God are the reverse of all this; particularly with respect to pardoning mercy their thoughts are different; carnal men think of mercy, but not of justice, and of having pardoning mercy in an absolute way, and not through Christ, and without conversion and repentance; and so this is a reason why men's thoughts are to be forsaken, because so very unlike to the Lord's. Or else these words are to be considered as an argument, proving that God does abundantly pardon all returning sinners; since he is not like men, backward to forgive, especially great and aggravated crimes, but is ready, free, and willing to forgive, even those of the most aggravated circumstances. Neither are your ways my ways, saith the Lord; the ways which God prescribes and directs men to walk in are different from theirs; his are holy, theirs unholy; his are plain, theirs crooked; his are ways of light, theirs ways of darkness; his are pleasant, theirs not so, at least in the issue; his lead to life, theirs to death; and therefore there is good reason why they should leave their evil ways, and walk in his. Moreover, the ways which he takes in the salvation of men are different from those which they, naturally pursue, and especially in the pardon of sin; he pardons freely, fully, without any reserve, or private grudge, forgetting as well as forgiving.”
Source
1849
A.D.
1774–1849
“My ways. I am not vindictive, but require a sincere conversion. (Calmet) — We cannot serve both God and the world. We must therefore adhere to the former. (Worthington)”
1871
A.D.
1871
“For--referring to Isa 55:7. You need not doubt His willingness "abundantly to pardon" (compare Isa 55:12); for, though "the wicked" man's "ways," and "the unrighteous man's thoughts," are so aggravated as to seem unpardonable, God's "thoughts" and "ways" in pardoning are not regulated by the proportion of the former, as man's would be towards his fellow man who offended him; compare the "for" (Psa 25:11; Rom 5:19).”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“The appeal, to leave their own way and their own thoughts, and yield themselves to God the Redeemer, and to His word, is now urged on the ground of the heaven-wide difference between the ways and thoughts of this God and the despairing thoughts of men (Isa 40:27; Isa 49:24), and their aimless labyrinthine ways. "For my thoughts are not your thoughts, neither are your ways my ways, saith Jehovah: no, heaven is high above the earth; so high are my ways above your ways, and my thoughts above your thoughts." The kı̄ (imo) introduces the undeniable statement of a fact patent to the senses, for the purpose of clearly setting forth, by way of comparison, the relation in which the ways and thoughts of God stand to those of man. There is no necessity to supply כאשׁר after כּי, as Hitzig and Knobel do. It is simply omitted, as in Isa 62:5 and Jer 3:20, or like כּן in Pro 26:11, etc. On what side the heaven-wide elevation is to be seen, is shown in what follows. They are not so fickle, so unreliable, or so powerless.”
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.