The interpretation timeline

1Cor 14:15

How this passage has been read — the sources, oldest to newest.

From the early Church Fathers to now.

2 Patristic · 3 Reformed

1Cor 14:15 · Douay-Rheims
“What is it then? I will pray with the spirit, I will pray also with the understanding; I will sing with the spirit, I will sing also with the understanding.”
Patristic before A.D. 750
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“We are the true adorers and the true priests, who, praying in spirit, sacrifice, in spirit, prayer,-a victim proper and acceptable to God, which assuredly He has required, which He has looked forward to for Himself! This victim, devoted from the whole heart, fed on faith, tended by truth, entire in innocence, pure in chastity, garlanded with love, we ought to escort with the pomp of good works, amid psalms and hymns, unto God's altar, to obtain for us all things from God.”
Source
169 years pass — nothing from this stretch is hosted yet
389
A.D.
A.D. 329–390
“Worshiping and praying in the Spirit seem to me to be simply the Spirit presenting prayer and worship to himself.”
1,325 years pass — nothing from this stretch is hosted yet
Post-Reformation c. 1650 – 1900
1714
A.D.
Matthew Henry Reformed
1662–1714
“The apostle here sums up the argument hitherto, and, I. Directs them how they should sing and pray in public (Co1 14:15): What is it then? I will pray with the spirit, and I will pray with the understanding also. I will sing with the spirit, etc. He does not forbid their praying or singing under a divine afflatus, or when they were inspired for this purpose, or had such a spiritual gift communicated to them; but he would have them perform both so as to be understood by others, that others might join with them. Note, Public worship should be performed so as to be understood. II. He enforces the argument with several reasons. 1. That otherwise the unlearned could not say Amen to their prayers or thanksgivings, could not join in the worship, for they did not understand it, Co1 14:16. He who fills up or occupies the place of the unlearned, that is, as the ancients interpret it, the body of the people, who, in most Christian assemblies, are illiterate; how should they say Amen to prayers in an unknown tongue? How should they declare their consent and concurrence? This is saying Amen, So be it. God grant the thing we have requested; or, We join in the confession that has been made of sin, and in the acknowledgment that has been made of divine mercies and favours. This is the import of saying Amen. All should say Amen inwardly; and it is not improper to testify this inward concurrence in public prayers and devotions, by an audible Amen. The ancient Christians said Amen aloud. Vide Just. Mart. apol. 2. prop fin. Now, how should the people say Amen to what they did not understand? Note, There can be no concurrence in those prayers that are not understood. The intention of public devotions is therefore entirely destroyed if they are performed in an unknown tongue. He who performs may pray well, and give thanks well, but not in that time and place, because others are not, cannot be, edified (Co1 14:17) by what they understand not. 2. He alleges his own example, to make the greater impression, concerning which observe, (1.) That he did not come behind any of them in this spiritual gift: "I thank my God, I speak with tongues more than you all (Co1 14:18); not only more than any single person among you, but more than all together." It was not envy at their better furniture that made Paul depreciate what they so highly valued and so much vaunted of; he surpassed them all in this very gift of tongues, and did not vilify their gift because he had it not. This spirit of envy is too common in the world. But the apostle took care to guard against this misconstruction of his purpose, by letting them know there was more ground for them to envy him upon this head than for him to envy them. Note, When we beat down men's unreasonable value for themselves, or any of their possessions or attainments, we should let them see, if possible, that this does not proceed from an envious and grudging spirit. We miss our aim if they can fairly give our conduct this invidious turn. Paul could not be justly censured, nor suspected for any such principle in this whole argument. He spoke more language than they all. Yet, (2.) He had rather speak five words with understanding, that is, so as to be understood, and instruct and edify others, than ten thousand words in an unknown tongue, Co1 14:19. He was so far from valuing himself upon talking languages, or making ostentation of his talents of this kind, that he had rather speak five intelligible words, to benefit others, than make a thousand, ten thousand fine discourses, that would do no one else any good, because they did not understand them. Note, A truly Christian minister will value himself much more upon doing the least spiritual good to men's souls than upon procuring the greatest applause and commendation to himself. This is true grandeur and nobleness of spirit; it is acting up to his character; it is approving himself the servant of Christ, and not a vassal to his own pride and vanity. 3. He adds a plain intimation that the fondness then discovered for this gift was but too plain an indication of the immaturity of their judgment: Brethren, be not children in understanding; in malice be you children, but in understanding be men, Co1 14:20. Children are apt to be struck with novelty and strange appearances. They are taken with an outward show, without enquiring into the true nature and worth of things. Do not you act like them, and prefer noise and show to worth and substance; show a greater ripeness of judgment, and act a more manly part; be like children in nothing but an innocent and inoffensive disposition. A double rebuke is couched in this passage, both of their pride upon account of their gifts, and their arrogance and haughtiness towards each other, and the contests and quarrels proceeding from them. Note, Christians should be harmless and inoffensive as children, void of all guile and malice; but should have wisdom and knowledge that are ripe and mature. They should not be unskilful in the word of righteousness (Heb 5:13), though they should be unskilful in all the arts of mischief.”
Source
1771
A.D.
John Gill Reformed
1697–1771
“What is it then?.... A Talmudic way of speaking, and answers to often used when a difficulty arises in any case, then the question is, "what is it then?" what is to be done? what is most prudent, advisable, and eligible? what is proper to be determined and resolved on in such a case? the same with "what then is to be said?" used by Philo the Jew (b): as here, shall I not pray with the Spirit at all, because my understanding, or that which I understand, is of no use to others, being not understood by them? shall I entirely neglect, lay aside, and make no use of the extraordinary gift of the Spirit, bestowed upon me on this account? no: I will pray with the Spirit; meaning not with the human breath, or spirit only, vocally, with an articulate voice, and distinct sounds, so as to he understood; nor with his own spirit, or in a spiritual way, with a spirit of devotion and fervency, with his whole heart and soul engaged in such service, though this is necessary to it; nor with the common and ordinary assistance of the Spirit of God, though without this prayer cannot be performed aright, with faith and fervency, freedom and boldness; but with the extraordinary gift of the Spirit, so as to pray in an extraordinary manner, with divers tongues, in an unknown language; this, as the apostle was capable of, he determined to use at proper times, and on proper occasions: but then he also resolves, and I will pray with the understanding also; not merely so as to understand himself, or with an understanding enlightened by the Spirit of God; with a spiritual experimental understanding of things, so as to know the object of prayer, the way of access to him, the need of the Spirit's influence, his own wants and necessities, and that he shall have the petitions he asks in faith, according to the will of God, all which is very requisite in prayer; but so as to be understood by others: his sense is, that though on some occasions he might choose to make use of his extraordinary gift, yet he would also pray in a language, in which he might be understood by the people; that so they might be able to join with him, and receive some fruit and advantage thereby; and that their souls might be refreshed, as well as his: I will sing with the Spirit; meaning also not with the spirit, or breath, singing vocally only; nor with his own Spirit, with his heart engaged in the work, with grace in it, in the lively exercise of faith, hope, and love, with much spiritual light, knowledge, experience, and judgment, which are very necessary to the due discharge of this duty; nor merely with the ordinary aid of the Spirit of God, which yet is greatly needful to excite attention, assist meditation, enlighten the understanding, raise the affections, strengthen faith, and make a comfortable application of what is sung; but as before, with the extraordinary gift of the Spirit, by which the apostle was capable of delivering out a psalm, or hymn, extempore, and that in an unknown tongue: but then he also determines, I will sing with the understanding also; not to his own understanding, or by or with the understanding of what is sung, though that is absolutely needful; but to the understanding of others, and in a language also which may be understood by others, and in which they could join with him in that service: perhaps the apostle may have some respect to the title of some of David's psalms, "Maschil", which signifies "causing to understand". (b) Leg. Alleg. l. 1. p. 48.”
Source
1871
A.D.
1871
“What is it then?--What is my determination thereupon? and--rather as Greek, "but"; I will not only pray with my spirit, which (Co1 14:14) might leave the understanding unedified, BUT with the understanding also [ALFORD and ELLICOTT]. pray with the understanding also--and, by inference, I will keep silence altogether if I cannot pray with the understanding (so as to make myself understood by others). A prescient warning, mutatis mutandis, against the Roman and Greek practice of keeping liturgies in dead languages, which long since have become unintelligible to the masses; though their forefathers spoke them at a time when those liturgies were framed for general use.”
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.