The interpretation timeline
Acts 28:26 Douay-Rheims

Saying: Go to this people, and say to them: With the ear you shall hear, and shall not understand; and seeing you shall see, and shall not perceive.

A.D. 220 – 1871 6 witnesses 7 excerpts

Patristic

before A.D. 750
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“Through them, to wit, had "the heart of the People been made thick, lest they should see with the eyes, and hear with the ears, and understand with a heart" obstructed by the "fats" of which He had expressly forbidden the eating, teaching man not to be studious of the stomach.”
311
A.D.
c. A.D. 260–311
“You will discover the meaning of this, my attentive hearer, if you do but take up and examine what follows upon this narration: For hearing, he says, ye shall hear, and shall not understand; and seeing, ye shall see, and not perceive.”
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"And when they agreed not among themselves, they departed, after that Paul had spoken one word, Well spake the Holy Ghost by Esaias the prophet unto our fathers, saying, Go unto this people, and say, Hearing ye shall hear, and shall not understand; and seeing ye shall see, and not perceive: for the heart of this people is waxed gross, and their ears are dull of hearing, and their eyes have they closed; lest they should see with their eyes, and hear with their ears, and understand with their heart, and should be converted, and I should heal them." But when they departed, as they were opposed to each other, then he reproaches them, not because he wished to reproach those that believed not, but to confirm these that believed. "Well said Esaias," says he to them. So that to the Gentiles it is given to know this mystery. No wonder then, if they did gainsay: this was foretold from the first.”
Source
“Then that you may not deem it strange that they believed not, he introduces the prophecy which saith "Hearing ye shall hear and not understand," more now than then: "and ye shall see and not perceive" more now than then. This is not spoken for the former sort, but for the unbelievers. How then? Was it contrary to the prophecy, that those believed? "Go," it says, "unto this people" that is, to the unbelieving people. He did not say this to insult them, but to remove the offence.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Saying, go unto this people, and say,.... A message sent in wrath and judgment to the people of Israel, rejected from being the people of God, a "lo ammi" being written upon them; and therefore God does not call them "his", but "this" people: and this message was sent by an evangelical prophet, who foretold, in the clearest manner, the Messiah's incarnation, and birth of a virgin, the work he was to do, the sufferings he should undergo, and the glory that should follow; and that after he had seen in a vision the glory of the King Messiah, the perfections of deity filling the temple of his human nature, him exalted on a throne, and attended and worshipped by angels; after he had had such a view of his beauty and excellency, that laid him low in his own sight, and humbled him under a sense of his own impurity and unworthiness; and after he had had a comfortable discovery and application of pardoning grace; and after he had expressed such a readiness and willingness to go on the Lord's errand: which one might have thought would have been of a different nature; and that he would have been sent, and have been made useful, to set forth the glories and excellencies of Christ's person, office, and grace, he had had such a view of; and to preach the comfortable doctrine of pardoning grace to men, which he had just now such a gracious experience of; but on the contrary, he is bid to say, hearing ye shall hear; with bodily ears, the Gospel preached by the Messiah and his apostles: and shall not understand, spiritually and experimentally, what they heard: to have an opportunity of hearing the Gospel, is a great blessing; seeing it is good news, glad tidings of good things, a joyful sound, and the voice of Christ himself; it is a distinguishing favour, and what all men at all times have not; when it is attended with a divine energy, the Spirit of God is received through it, regeneration, quickening and sanctifying grace are by it; faith comes by hearing it, and Christ is found under the ministration of it; and, generally speaking, the understanding and knowledge of divine things, are by means of it: men are naturally without the understanding of spiritual things, and where the Gospel is not, they remain so; the ministers of the Gospel, and the word preached by them, are the means of leading men into a spiritual understanding of things, though only as, and when attended with the Spirit of God, who is a Spirit of wisdom and revelation, in the knowledge of Christ: and a special mercy it is when persons, whilst hearing the word, understand what they hear, and can distinguish truth from error; and approve of the truth, receive the love of it, feel the power, and taste the sweetness of it; find it and eat it, believe, embrace, and profess it, and bring forth fruits worthy of it: but on the contrary, when it is heard and not understood, it is an awful dispensation; for hence either they content themselves with bare hearing, and depend upon it for salvation; or they despise and speak evil of what they do not understand; and so their hearing, instead of being a blessing, is an aggravation of their condemnation: and seeing ye shall see: miracles wrought: and not perceive; them to be proofs of the things, for which they are wrought: so Jarchi expounds those words, "ye shall see the wonders, or miracles I have done for you, and shall not set your hearts to know me'' from whence it appears that the Gospel preached in the clearest and most powerful manner, and even miracles wrought in confirmation of it, are insufficient for conversion; and nothing will effect it, but efficacious grace.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Hearing ye shall hear, etc. - See the notes on Mat 13:14, and Joh 12:39, Joh 12:40.”
1871
A.D.
1871
“Hearing, ye shall hear, &c.--(See on Mat 13:13-15 and Joh 12:38-40). With what pain would this stern saying be wrung from him whose "heart's desire and prayer to God for Israel was that they might be saved," and who "had great heaviness and continual sorrow in his heart" on their account (Rom 10:1; Rom 9:2)!”
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.