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.

Wherefore tongues are for a sign - The miraculous gift of tongues was never designed for the benefit of those who have already believed, but for the instruction of unbelievers, that they might see from such a miracle that this is the work of God; and so embrace the Gospel. But as, in the times of the prophet, the strange Babylonish tongues came in the way of punishment, and not in the way of mercy; take heed that it be not the case now: that, by dwelling on the gift, ye forget the Giver; and what was designed for you as a blessing, may prove to you to be a curse. For if, because ye have the gift of tongues, ye will choose for your own aggrandizement to use them in the public congregation where none understands them, God may curse your blessings.

Prophesying - Teaching the things of God in a known language is of infinitely more consequence than speaking in all the foreign tongues in the universe.

If therefore the whole church,.... The whole congregation of believers incorporated together in a Gospel church state, consisting of its officers and private members; the church at Corinth is particularly designed:

be come together in one place; to worship God, to pray unto him, sing his praise, preach and hear the word, as were usually done. Hence may be observed the custom of the primitive churches to meet together, in some certain place, for divine worship; nor did the members of them in common forsake the assembling of themselves together on that account, though it was the evil practice of some of them; the whole church, all the members of it, met together: and it may be seen from hence, that the church, and the place where it met, are two different things:

and all speak with tongues; divers tongues, languages not understood; meaning, not that all that came together spoke with tongues; but that as many as did speak, should they speak with such, and without an interpreter.

And there come in those that are unlearned, or unbelievers; either private Christians, who, though they have learned Christ, and understand the doctrines of the Gospel, yet are ignorant of languages; or rather the same persons with unbelievers, Heathens that have no knowledge of Christ, nor faith in him, and who also understood no other language but the Greek: if any such persons should come into the place where the church was met together, and should hear him or them that spoke, speak in a language they understood not, and which they were very well assured was equally unknown to the whole congregation, and so could be of no service to them:

will they not say ye are mad? act like men in a frenzy, that have not the use of their reason; since speaking in a strange language to a congregation that know not one word of what is said, is speaking to the air, and to no profit at all to them that hear; and who but a madman would do this? The apostle here argues from the scandal and contempt that would be poured upon them by such a practice; and the rather he mentions this, because it seems as if their governing view was the glory and applause of men, in which, he suggests, they would be sadly disappointed.

Thus from Isaiah it appears, reasons Paul, that "tongues" (unknown and uninterpreted) are not a sign mainly intended for believers (though at the conversion of Cornelius and the Gentiles with him, tongues were vouchsafed to him and them to confirm their faith), but mainly to be a condemnation to those, the majority, who, like Israel in Isaiah's day, reject the sign and the accompanying message. Compare "yet . . . will they not hear Me" (Co1 14:21). "Sign" is often used for a condemnatory sign (Eze 4:3-4; Mat 12:39-42). Since they will not understand, they shall not understand.

prophesying . . . not for them that believe not, but . . . believe--that is, prophesying has no effect on them that are radically and obstinately like Israel (Isa 28:11-12), unbelievers, but on them that are either in receptivity or in fact believers; it makes believers of those not wilfully unbelievers (Co1 14:24-25; Rom 10:17), and spiritually nourishes those that already believe.