In this passage the apostle pursues the argument, and reasons from other topics; as,

I.Tongues, as the Corinthians used them, were rather a token of judgment from God than mercy to any people (Co1 14:21): In the law (that is, the Old Testament) it is written, With men of other tongues and other lips will I speak to this people; and yet for all this they will not hear me, saith the Lord, Isa 28:11. Compare Deu 28:46, Deu 28:49. To both these passages, it is thought, the apostle refers. Both are delivered by way of threatening, and one is supposed to interpret the other. The meaning in this view is that it is an evidence that a people are abandoned of God when he gives them up to this sort of instruction, to the discipline of those who speak in another language. And surely the apostle's discourse implies, "You should not be fond of the tokens of divine displeasure. God can have no gracious regards to those who are left merely to this sort of instruction, and taught in language which they cannot understand. They can never be benefited by such teaching as this; and, when they are left to it, it is a sad sign that God gives them over as past cure." And should Christians covet to be in such a state, or to bring the churches into it? Yet thus did the Corinthian preachers in effect, who would always deliver their inspirations in an unknown tongue.

II.Tongues were rather a sign to unbelievers than to believers, Co1 14:22. They were a spiritual gift, intended for the conviction and conversion of infidels, that they might be brought into the Christian church; but converts were to be built up in Christianity by profitable instructions in their own language. The gift of tongues was necessary to spread Christianity, and gather churches; it was proper and intended to convince unbelievers of that doctrine which Christians had already embraced; but prophesying, and interpreting scripture in their own language, were most for the edification of such as did already believe: so that speaking with tongues in Christians assemblies was altogether out of time and place; neither one nor the other was proper for it. Note, That gifts may be rightly used, it is proper to know the ends which they are intended to serve. To go about the conversion of infidels, as the apostles did, had been a vain undertaking without the gift of tongues, and the discovery of this gift; but, in an assembly of Christians already converted to the Christian faith, to make use and ostentation of this gift would be perfectly impertinent, because it would be of no advantage to the assembly; not for conviction of truth, because they had already embraced it; not for their edification, because they did not understand, and could not get benefit without understanding, what they heard.

III.The credit and reputation of their assemblies among unbelievers required them to prefer prophesying before speaking with tongues. For, 1. If, when they were all assembled for Christian worship, their ministers, or all employed in public worship, should talk unintelligible language, and infidels should drop in, they would conclude them to be mad, to be no better than a parcel of wild fanatics. Who in their right senses could carry on religious worship in such a manner? Or what sort of religion is that which leaves out sense and understanding? Would not this make Christianity ridiculous to a heathen, to hear the ministers of it pray, or preach, or perform any other religious exercise, in a language that neither he nor the assembly understood? Note, The Christian religion is a sober and reasonable thing in itself, and should not, by the ministers of it, be made to look wild or senseless. Those disgrace their religion, and vilify their own character, who do any thing that has this aspect. But, on the other hand, 2. If, instead of speaking with tongues, those who minister plainly interpret scripture, or preach, in language intelligible and proper, the great truths and rules of the gospel, a heathen or unlearned person, coming in, will probably be convinced, and become a convert to Christianity (Co1 14:24, Co1 14:25); his conscience will be touched, the secrets of his heart will be revealed to him, he will be condemned by the truth he hears, and so will be brought to confess his guilt, to pay his homage to God, and own that he is indeed among you, present in the assembly. Note, Scripture - truth, plainly and duly taught, has a marvellous aptness to awaken the conscience, and touch the heart. And is not this much more for the honour of our religion than that infidels should conclude the ministers of it a set of madmen, and their religious exercises only fits of frenzy? This last would at once cast contempt on them and their religion too. Instead of procuring applause for them, it would render them ridiculous, and involve their profession in the same censure: whereas prophesying would certainly edify the church, much better keep up their credit, and might probably convince and convert infidels who might occasionally hear them. Note, Religious exercises in Christian assemblies should be such as are fit to edify the faithful, and convince, affect, and convert unbelievers. The ministry was not instituted to make ostentation of gifts and parts, but to save souls.

But if all prophecy - If all those who teach do it in the tongue which all understand; if an unbeliever, or one who knows nothing of the sacred language, come in and hear things just suited to his own state, he is convicted by all, and he is judged by all.

And thus are the secrets of his heart made manifest,.... Not to the prophets, or preachers, or to the rest of the congregation, but to himself; the word preached being in the hands, and trader the influence, direction, and application of the Spirit of God, a discerner of the thoughts and intents of the heart; showing the plague and naughtiness of it, discovering the lusts that are in it, detecting the errors of the mind, and filling the conscience with a sense of guilt, and a consciousness of deserved punishment; so that the person looks upon himself as particularly spoken to, and as if the person speaking had knowledge of all that was within him, and adapted his discourse on purpose to him, and delivered it for his sake alone; concluding, that there is, and must be, something more than human in it:

and so falling down on his face: either publicly before the whole congregation; or when retired, as one ashamed of his sins and errors, and not able to look either God, or good men, in the face; and being in an adoration posture; or however, being truly humbled before God under a sense of his iniquities,

he will worship God; pray unto him, and earnestly entreat he would be merciful to him a sinner, and blot out all his transgressions, and forgive him all his sins; and will ever after acknowledge him to be the true God, embrace his Gospel, submit to his ordinances, and attend his service:

and report: or "declare", freely and openly to the church, to all men, to the world, and to his company from whence he came, and to whom he belonged,

that God is in you of a truth: that the Spirit of God, who is truly God, and searches the deep things of God, and reveals them, and the deep things of men, and makes them manifest, is in the prophets and preachers, otherwise they would never be able to make manifest the secrets of the heart as they do; and that the presence of God is in the church, and the power of God goes along with the ministration of the word: hereby, now many valuable ends are answered, a sinner is converted, God is worshipped and glorified, credit is brought to religion, the church of Christ is spoken well of, and prophets or preachers are honoured; wherefore prophesying, seeing it is both for the edification of believers, and conversion of sinners, ought to be desired, and made use of before speaking with tongues.

all--one by one (Co1 14:31).

prophesy--speak the truth by the Spirit intelligibly, and not in unintelligible tongues.

one--"anyone." Here singular; implying that this effect, namely, conviction by all, would be produced on anyone, who might happen to enter. In Co1 14:23 the plural is used; "unlearned or unbelievers"; implying that however many there might be, not one would profit by the tongues; yea, their being many would confirm them in rejecting the sign, as many unbelieving men together strengthen one another in unbelief; individuals are more easily won [BENGEL].

convinced--convicted in conscience; said of the "one that believeth not" (Joh 16:8-9).

judged--His secret character is opened out. "Is searched into" [ALFORD]. Said of the "one unlearned" (compare Co1 2:15).