The interpretation timeline
2 Timothy 3:15 Douay-Rheims

And because from thy infancy thou hast known the holy scriptures, which can instruct thee to salvation, by the faith which is in Christ Jesus.

A.D. 407 – 1871 6 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"But continue thou in the things that thou hast learned and hast been assured of, knowing of whom thou hast learned them; And that from a child thou hast known the holy Scriptures, which are able to make thee wise unto salvation through the faith which in Christ Jesus." What is this? As the prophet David exhorted, saying, "Be not thou envious against the workers of iniquity" (Ps. xxxvii. 1), so Paul exhorts, "Continue thou in the things which thou hast learned," and not simply learned, but "hast been assured of," that is, hast believed. And what have I believed? That this is the Life. And if thou seest things happening contrary to thy belief, be not troubled. The same happened to Abraham, yet he was not affected at it. He had heard, "In Isaac shall thy seed be called" (Gen. xxi. 12); and he was commanded to sacrifice Isaac, yet he was not troubled nor dismayed. Let no one be offended because of the wicked. This the Scripture taught from the beginning. "Knowing that from a child thou hast known the sacred writings." The holy Scriptures he calls "sacred writings." In these thou wast nurtured, so that through them thy faith ought to be firm and unshaken. For the root was laid deep, and nourished by length of time, nor will anything subvert it. And speaking of the holy Scriptures, he has added, "Which are able to make thee wise," that is, they will not suffer thee to have any foolish feeling, such as most men have. For he who knows the Scriptures as he ought, is not offended at anything that happens; he endures all things manfully, referring them partly to faith, and to the incomprehensible nature of the divine dispensation, and partly knowing reasons for them, and finding examples in the Scriptures. Since it is a great sign of knowledge not to be curious about everything, nor to wish to know all things. "Which are able," he says, "to make thee wise unto salvation." For the Scriptures suggest to us what is to be done, and what is not to be done.”
Source

Scholastic

c. 1100 – 1500
1273
A.D.
Thomas Aquinas Catholic
1225–1274
“Above, he set before Timothy as an example the persecutions which he himself had suffered. And lest he should seem to have passed through such sufferings alone, he shows that they are common to the saints. And first he teaches how the saints suffer here the defects of punishment; second, how the wicked advance through the defect of guilt, at the place "but evil men." He says therefore: I have endured persecutions, and not only I, but all. "Piously" is taken in two ways: sometimes for the virtue of piety toward divine worship, above in the same place, "having a form of piety"; sometimes for mercy toward one's neighbor, 1 Tim. 4:8: "piety is profitable unto all things." Therefore all who wish to live piously in Christ, etc., that is, wish to observe the worship of the Christian religion. Tit. 2:12: "that we should live soberly, and justly, and piously in this world, etc." And such will suffer persecution, and especially in the primitive Church, when Christ was attacked on every side by Jews and Gentiles. And therefore John 16:2: "the hour comes that whoever kills you will think that he offers a service to God." Matt. 24:9: "you shall be hated by all nations for my name's sake." Likewise all who wish piously, etc., that is, wish through the faith of Christ to keep mercy toward their neighbor, it is necessary that they suffer persecution, and if not from without, yet from within, namely when they suffer with the defects of their neighbors, whose faults and punishments they see. 2 Cor. 11:29: "who is scandalized, and I am not burned? etc." 2 Pet. 2:8: "dwelling among them, who from day to day tormented the just soul with unjust deeds." Ps. 118:158: "I saw the transgressors, and I pined away, etc." Likewise there are other persecutions, which cannot be lacking to all the saints, namely of the flesh, the world, and the Devil: because, as is found in Gal. 5:17, "the flesh lusts against the spirit." Rom. 7:24: "unhappy man that I am, who shall deliver me from the body of this death?" Ps. 33:2: "many are the tribulations of the just." Then when he says "but evil men," he shows that the wicked fall into worse evils, namely of guilt. He says "evil" in themselves, namely insofar as they cling to sins. Matt. 21:41: "he will destroy the evil men evilly, etc." And "seducers," namely to the harm of their neighbors, insofar as they lead them away from the way of truth, which is common. Rom., last chapter: "by sweet words and blessings they seduce the hearts of the innocent." But these, not content with the evils which they have done, will advance to the worse. Apoc., last chapter: "he who is filthy, let him be filthy still." But against this, above in the same place: "they shall proceed no further." It must be said that those who advance to the worse are permitted by God, or thus: that they advance to the worse from the intention of their malice, which is always toward evil; but according to divine providence they are prevented, lest they be able to fulfill what they began. Now the wicked advance to the worse in themselves, insofar as they err concerning the truth. Matt. 22:29: "you err, not knowing the Scriptures, nor the power of God." Likewise they err in deed, and in this way all the wicked err. Prov. 14:22: "all who work evil err." Likewise in their neighbors, because they are seducers, whence he says "sending into error," namely by persuading that they can come to the kingdom of heaven through prosperity, against that which is above, 3:12: "those who wish piously, etc." And Is. 3:12: "my people, they who call you blessed, they themselves deceive you." Then when he says "but you," he warns him to remain in his instruction. And he exhorts him in three ways: namely on the part of the teacher, on the part of Timothy himself, and on the part of the things which he received. He says therefore: "you have followed my doctrine, etc.," as above 3:10: "therefore remain in these things"; Ecclus. 10:4: "if the spirit of one who has power rises up against you, do not leave your place." 1 Cor. 15:58: "be steadfast and immovable." He says therefore "what you have learned, and what has been entrusted to you," because every Christian learns the things that are of faith; and this is saving doctrine. John 6:45: "everyone who has heard from my Father, and has learned, comes to me, etc." But especially the teachings of the faith are entrusted to prelates, insofar as they must dispense them to others. Gal. 2:7: "when they had seen that the Gospel of the uncircumcision was entrusted to me." And why is it necessary to remain? Because I had it from a teacher of knowledge, who could not err. 2 Cor. 13:3: "Christ speaks in me." And therefore remain firmly in these things, knowing from whom you learned, namely from Paul, who learned not from man, nor through man, etc., Gal. 2. Second, from his own condition. For it is shameful for a man nourished in good from boyhood to fail in old age. Ecclus. 26:27: "he who passes from justice to sin, God has prepared him for the sword." But Timothy was thus nourished. Prov. 22:6: "a young man according to his way, even when he is old he will not depart from it." Whence he says "and because from infancy you have known the sacred letters," which are the letters of the Old Testament, which he learned from infancy, because he was the son of a Jewish woman, Acts 16:1. Whence his mother had him instructed in them. Which is against the Manichean, because the apostle here names the Old Testament "sacred letters," which cannot be understood of the New Testament, because from his infancy he had not been taught the letters of the New Testament. Third, from the part of the things which he received, and this is the third reason. For if someone has some knowledge in which there is no usefulness, he abandons it, and passes to another. But if the knowledge is very useful, it is foolish to let it go. And first he makes the argument; second he makes it clear, at the place "all Scripture." He says therefore: I say that you have received the sacred letters, which are not to be despised, because they are useful. Is. 48:17: "I am the Lord your God, teaching you useful things." Whence he adds, saying "which can instruct you." John 6:69: "Lord, to whom shall we go? You have the words of eternal life." John 5:39: "search the Scriptures, in which you think you have eternal life; they are the ones that bear witness of me." And these letters can instruct you unto salvation; but only through the faith which is in Christ Jesus. Rom. 10:4: "for the end of the law is Christ, unto justice to every one that believes." Heb. 11:6: "for without faith it is impossible to please God." But he makes the argument clear, saying "all." Where he shows that the sacred letters are the way to salvation. And he sets down three things. For he commends the Scriptures by reason of their principle, by reason of their useful effect, and by reason of their final fruit and advancement. For if you consider its principle, it has a privilege above all others, because the others were handed down through human reason, but sacred Scripture is divine; therefore he says "Scripture divinely inspired." 2 Pet. 1:21: "for prophecy was not brought at any time by the will of man, but the holy men of God spoke, inspired by the Holy Spirit." Job 32:7: "the inspiration of the Almighty gives understanding." But you will say: how is not every other Scripture also divinely inspired, since according to Ambrose, every truth, by whomever it is spoken, is from the Holy Spirit? It must be said that God works something in two ways: namely immediately, as his own work, like miracles; and something through the mediation of lower causes, as natural works, Job 10:8: "your hands, Lord, made me, etc.," which nevertheless come about by the operation of nature. And thus in man he instructs the intellect both immediately through the sacred letters, and mediately through other writings. The effect of this Scripture is twofold: namely because it teaches to know the truth, and persuades to work justice. John 14:26: "but the Paraclete, the Holy Spirit, will teach," namely the things to be known, "and will suggest" the things to be done. And therefore it is useful for knowing the truth, and it is useful for directing in action. For there is a speculative reason, and there is also a practical reason. And in each of the two, two things are necessary: namely that it know the truth, and that it refute error. For this work is the work of the wise man, namely not to lie, and to refute the one who lies. As to the first he says "it is useful for teaching," namely the truth. Ps. 118:66: "teach me goodness and discipline and knowledge." As to the second he adds "for reproving." Tit. 1:9: "that you may be able to exhort in sound doctrine, and to reprove those who contradict." Likewise as to the practical, two things are necessary: namely that it lead back from evil, and induce to good. Ps. 33:15: "turn away from evil, and do good." As to the first he says "for correcting," which is to correct from evil. Matt. 18:15: "if your brother sins against you, go, and correct him between you and him alone." Job 5:17: "blessed is the man who is corrected by the Lord." As to the second he says "for instructing in justice." And sacred Scripture does all these things. Is. 8:11: "with a strong hand he instructed me, etc." So then the effect of sacred Scripture is fourfold: namely to teach the truth, to refute falsity — as regards the speculative; to snatch away from evil, and to lead to good — as regards the practical. Its last effect is that it leads men to the perfect. For it does not make good in just any way, but it perfects. Heb. 6:1: "let us be carried on to perfection." And therefore he says "that the man of God may be perfect," because a man cannot be perfect, unless he be a man of God. For that is perfect to which nothing is lacking. Then therefore a man is perfect, when he is instructed, that is, prepared, unto every good work, not only unto those things which are of the necessity of salvation, but also unto those which are of supererogation. Gal., last chapter: "but doing good, let us not fail."”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“All Scripture is given by inspiration of God,.... That is, all holy Scripture; for of that only the apostle is speaking; and he means the whole of it; not only the books of the Old Testament, but of the New, the greatest part of which was now written; for this second epistle to Timothy is by some thought to be the last of Paul's epistles; and this also will hold good of what was to be written; for all is inspired by God, or breathed by him: the Scriptures are the breath of God, the word of God and not men; they are "written by the Spirit", as the Syriac version renders it; or "by the Spirit of God", as the Ethiopic version. The Scriptures are here commended, from the divine authority of them; and which is attested and confirmed by various arguments; as the majesty and loftiness of their style, which in many places is inimitable by men; the sublimity of the matter contained in them, which transcends all human understanding and capacity ever to have attained unto and discovered; as the trinity of persons in the Godhead, the incarnation of Christ, the resurrection of the dead, &c. The purity and holiness of them before observed, show them to be the word of him that is of purer eyes than to behold iniquity; as also their harmony and agreement, though wrote by different persons, in different places, and ages, and at sundry times, and in divers manners; what seeming inconsistencies are observed in them may, with labour and industry, by divine assistance, be reconciled. The predictions of future events in them, as particularly concerning Josiah and Cyrus, by name, long before they were born, and especially concerning Jesus Christ, and which have had their accomplishment, and many others in the New Testament both by Christ and his apostles, are a proof that they could not be the writings of men, but must have the omniscient God for their author; the impartiality of the writers of them, in not concealing the mean extract of some of them, the sins of others before conversion, and even their sins and failings afterwards, as well as those of their nearest relations and dearest friends, strengthens the proof of their divine authority; to which may be added, the wonderful preservation of them, through all the changes and declensions of the Jewish church and state, to whom the books of the Old Testament were committed; and notwithstanding the violence and malice of Heathen persecutors, particularly Dioclesian, who sought to destroy every copy of the Scriptures, and published an edict for that purpose, and notwithstanding the numbers of heretics, and who have been in power, as also the apostasy of the church of Rome; and yet these writings have been preserved, and kept pure and incorrupt, which is not the case of other writings; nor are there any of such antiquity as the oldest of these: to which may be subjoined the testimony of God himself; his outward testimony by miracles, wrought by Moses and the prophets, concerned in the writings of the Old Testament, and by the apostles in the New; and his internal testimony, which is the efficacy of these Scriptures on the hearts of men; the reading and hearing of which, having been owned for the conversion, comfort and edification of thousands and thousands, and ten thousand times ten thousand: and is profitable for doctrine; for the discovering, illustrating, and confirming any doctrine concerning God, the being, persons, and perfections of God; concerning the creation and fall of man; concerning the person and offices of Christ, redemption by him, justification by his righteousness, pardon by his blood, reconciliation and atonement by his sacrifice, and eternal life through him, with many others. The Scripture is profitable for ministers to fetch doctrine from, and establish it by; and for hearers to try and prove it by: for reproof; of errors and heresies; this is the sword of the Spirit, which cuts all down. There never was, nor is, nor can be any error or heresy broached in the world, but there is a sufficient refutation of it in the Scriptures; which may be profitably used for that purpose, as it often has been by Christ and his apostles, and others since in all ages: for correction; of vice; there being no sin, but the evil nature of it is shown, its wicked tendency is exposed, and the sad effects and consequences of it are pointed out in these writings: for instruction in righteousness; in every branch of duty incumbent upon men; whether with respect to God, or one another; for there is no duty men are obliged unto, but the nature, use, and excellency of it, are here shown: the Scriptures are a perfect rule of faith and practice; and thus they are commended from the usefulness and profitableness of them.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“From a child thou hast known the Holy Scriptures - The early religious education of Timothy has been already sufficiently noticed; see Ti2 1:5, and the preface to the first epistle. St. Paul introduces this circumstance again here for the confirmation of Timothy's faith. He had learned the doctrines of Christianity from a genuine apostle; and, as Christianity is founded on the law and the prophets, Timothy was able to compare its doctrines with all that had been typified and predicted, and consequently was assured that the Christian religion was true. Able to make thee wise unto salvation - The apostle is here evidently speaking of the Jewish Scriptures; and he tells us that they are able to make us wise unto salvation provided we have faith in Jesus Christ. This is the simple use of the Old Testament. No soul of man can be made wise unto salvation by it, but as he refers all to Christ Jesus. The Jews are unsaved though they know these Scriptures, because they believe not in Christ; for Christ is the end of the law for the justification of all that believe.”
Source
1863
A.D.
1796–1863
“The piety of his mother had placed the Scriptures in his hands as soon as he was able to read them.”
1871
A.D.
1871
“from a child--literally, "from an infant." The tender age of the first dawn of reason is that wherein the most lasting impressions of faith may be made. holy scriptures--The Old Testament taught by his Jewish mother. An undesigned coincidence with Ti2 1:5; Act 16:1-3. able--in themselves: though through men's own fault they often do not in fact make men savingly alive. wise unto salvation--that is, wise unto the attainment of salvation. Contrast "folly" (Ti2 3:9). Wise also in extending it to others. through faith--as the instrument of this wisdom. Each knows divine things only as far as his own experience in himself extends. He who has not faith, has not wisdom or salvation. which is in--that is, rests on Christ Jesus.”
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.