The interpretation timeline
Acts 4:13 Douay-Rheims

Now seeing the constancy of Peter and of John, understanding that they were illiterate and ignorant men, they wondered; and they knew them that they had been with Jesus.

A.D. 407 – 1871 7 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"Now when they saw the boldness of Peter and John, and perceived that they were unlearned and ignorant men, they marvelled and they took knowledge of them, that they had been with Jesus." The two unlearned men beat down with their rhetoric them and the chief priests. For it was not they that spake, but the grace of the Spirit. Behold another miracle not less than the former. "And beholding the boldness of Peter and John," etc. "And they took knowledge of them that they had been with Jesus." Not without a meaning has the Evangelist set down this passage; but in saying, "they recognized them that they had been with Jesus," he means, in His Passion: for only these were with Him at that time, and then indeed they had seen them humble, dejected: and this it was that most surprised them: the greatness of the change. For in fact Annas and Caiaphas with their company were there, and these then also had stood by Him, and their boldness now amazed them. "And beholding the boldness." For not only their words; their very bearing showed it; that they should stand there so intrepidly to be tried in a cause like this, and with uttermost peril impending over them! Not only by their words, but by their gesture also, and their look and voice, and, in short, by everything about them, they manifested the boldness with which they confronted the people. From the things they uttered, they marvelled, perhaps: "that they were unlearned and common men:" for one may be unlearned, yet not a common or private man, and a common man, yet not unlearned. "Having perceived," it says. Whence? From what they said? Peter does not draw out long speeches, but then by his very manner and method he declares his confidence. "And they recognized them that they had been with Jesus." Which circumstance made them believe that it was from Him they had learned these things, and that they did all in the character of His disciples.”
Source
523
A.D.
c. A.D. 450–523
“The chief priests of the Jews marvelled at the Apostles, because being simple and unlettered men they were making answers like wise men to questions concerning the life which is to come, and they became advocates of Christ through their simplicity. For Christ took foolish advocates to speak for Him, that through them He might the more proclaim the triumph of His wisdom, and that it might be known unto all men that it was not they who were speaking but He Who spoke in them; "They perceived that they were unlearned and ignorant men; and they remembered that they had gone hither and thither with Jesus", and they marvelled at them. So then that simplicity should keep the commandments was also a marvellous thing, and that ignorant men should do what wise men could not was a thing to be wondered at. For if the priests had been acquainted with the Apostles before the time when they became wise men, and they had not spoken wisely, they would not have been greatly astonished at them, for they would have heard from them that which befitted their instruction; but they marvelled especially at them because they heard from them what they expected not, and they answered them with speech which was above the measure of all wise men, and through their simplicity Jesus triumphed, and His wisdom was proclaimed before all men.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Now when they saw the boldness of Peter and John,.... With what courage and intrepidity they stood before them, the presence of mind they had, and the freedom of speech they used, as the word properly signifies: they observed their elocution, the justness of their diction, the propriety of their language, and the strength and nervousness of their reasoning; as well as their great resolution, constancy, and firmness of mind; not being afraid to profess the name of Christ, or to charge them with the murder of him; and that they seemed to be determined to abide by him, at all events; to assert him to be the true Messiah, though rejected by the Jewish builders; and that he was risen from the dead; and not only to ascribe unto him the miracle now wrought, but the salvation of men; and to declare, that there was none in any other but him: the Syriac version renders it, "when they heard the word of Simeon and John, which they spoke openly": and freely, without any reserve: they answered readily to the question, that it was by the name of Jesus of Nazareth that they had done this miracle; they dealt freely with the Jewish sanhedrim, and told them in so many words, that they were the crucifiers of Christ, and the rejecters of that stone, which God had made the head of the corner, and that there was no salvation for them in any other: it appears from hence, that John spoke as well as Peter, though his words are not recorded: and perceived that they were unlearned ignorant men; not by what they now said, but by what they heard and understood of them before: they were informed that they were "unlearned" men, or who did not understand letters; not but that they had learned their mother tongue, and could read the Scriptures; but they had not had a liberal education; they had not been brought up at the feet of any of the doctors, in any of the schools and universities of the Jews; they were not trained up in, and conversant with, the nice distinctions, subtle argumentations, and decisions of the learned doctors, in the interpretation of the law of Moses, and the traditions of the elders: and understood that they were also "ignorant" men, "idiots", or private men; for men might be unlearned, and yet not be such; it seems the high priests themselves were sometimes unlearned men: hence, on the day of atonement, "they used to read before him, in the order of the day, and say to him, Lord high priest, read thou with thine own mouth; perhaps thou hast forgot, or it may be, , "thou hast not learned" (c).'' The Jews have adopted the word here used into their language; and express by it, sometimes a man that is mean, abject, and contemptible: thus instead of "children of base men", or "without a name", the Targumist on Job 30:8 reads, , "the children of idiots", or "private men": and in the Targum on Sa1 18:23 it is used for one lightly esteemed, and comparable to a flea: it sometimes designs persons in a private life, though men of learning and knowledge, in distinction from those that are in office; so we read (d), that "three kings, and four "private" persons, have no part in the world to come; the three kings are Jeroboam, Ahab, and Manasseh; the four "idiots", or private men, are Balaam, Doeg, Ahithophel, and Gehazi.'' And so a bench of idiots, or private men, is distinguished from a bench of authorized and approved judges (e); and sometimes the word is used of such, as are distinguished from doctors, or wise men; so when it is said (f), "the command of plucking off the shoe, is done before three judges, and though the three are "idiots";'' the note of Maimonides upon it is, "not wise men, but that know how to read the language,'' the Hebrew language: and such were the disciples, in every sense of the word; they were mean and abject, poor fishermen, men of no name and figure, that were in no office, and exalted station of life, nor versed in Jewish learning, but common private men: so that they marvelled; the sanheddrim were astonished to hear them talk with so much fluency and pertinence: and they took knowledge of them, that they had been with Jesus; looking wistly upon them, they knew them again, and remembered that; they were persons that were the disciples of Jesus, and whom they had seen in company with him; not in the high priest's palace, when Jesus was arraigned, examined, and condemned there; though Peter, and some think John was there at that time, yet not to be observed and taken notice of by the sanhedrim; but in the temple where Jesus taught, and where the chief priests, Scribes, and elders came, and disputed with him about his authority, and cavilled at him, Mat 21:15. (c) Misn. Yoma, c. 1. sect. 3. (d) Misn. Sanhedrin, c. 11. sect. 2. (e) T. Bab. Bava Metzia, fol. 32. 11. (f) Misn. Yebamot, c. 12. sect. 1.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“The boldness of Peter and John - Την παρῥησιαν, The freedom and fluency with which they spoke; for they spoke now from the immediate influence of the Holy Ghost, and their word was with power. That they were unlearned and ignorant men - Αγραμματοι, Persons without literature, not brought up in nor given to literary pursuits - and ignorant, ιδιωται, persons in private life, brought up in its occupations alone. It does not mean ignorance in the common acceptation of the term; and our translation is very improper. In no sense of the word could any of the apostles be called ignorant men; for though their spiritual knowledge came all from heaven, yet in all other matters they seem to have been men of good, sound, strong, common sense. They took knowledge of them - Επεγινωσκον may imply that they got information, that they had been disciples of Christ, and probably they might have seen them in our Lord's company; for there can be little doubt that they had often seen our Lord teaching the multitudes, and these disciples attending him. That they had been with Jesus - Had they not had his teaching, the present company would soon have confounded them; but they spoke with so much power and authority that the whole sanhedrin was confounded. He who is taught in spiritual matters by Christ Jesus has a better gift than the tongue of the learned. He who is taught in the school of Christ will ever speak to the point, and intelligibly too; though his words may not have that polish with which they who prefer sound to sense are often carried away.”
Source
1849
A.D.
1774–1849
“The constancy of Peter and John, surprised the council very much. They admired their knowledge of the Scriptures, seeing them men without learning or letters,[2] and (as they are called idiots ) they could not find how to contradict the fact, the man that was healed, being there present. (Witham) — Here, with the Jewish people, you may admire the constancy, wisdom, and learning of the apostles, after the coming of the Holy Ghost, who, before that event, were simple, unlettered, and timorous men. See ver. 19; and again, Chap. v. 29.”
Source
1871
A.D.
1871
“perceived that they were unlearned and ignorant men--that is, uninstructed in the learning of the Jewish schools, and of the common sort; men in private life, untrained to teaching. took knowledge of them that they had been with Jesus--recognized them as having been in His company; remembering possibly, that they had seen them with Him [MEYER, BLOOMFIELD, ALFORD]; but, more probably, perceiving in their whole bearing what identified them with Jesus: that is, "We thought we had got rid of Him; but lo! He reappears in these men, and all that troubled us in the Nazarene Himself has yet to be put down in these His disciples." What a testimony to these primitive witnesses! Would that the same could be said of their successors!”
Source

Undated

date unknown
date
unknown
Glossa Ordinaria Medieval
“Without letters, etc. These things were said not because they were altogether ignorant of letters, but because they had not the skill of the art of grammar. Unlearned. They were called unlearned because they had not exercised their own natural ability through instruction: ἰδίωμα in Greek, in Latin peculiarity. Unlettered men are sent to preach, lest the faith of believers should be thought to come about not by the power of God but by eloquence: according to that saying: Not in wisdom of speech, lest the cross of Christ be made void.”
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.