1Cor 14:2

“At this point he makes a comparison between the gifts, and lowers that of the tongues, showing it to be neither altogether useless, nor very profitable by itself. For in fact they were greatly puffed up on account of this, because the gift was considered to be a great one. And time of building the tower the one tongue was divided into many; so then the many tongues frequently met in one man, and the same person used to discourse both in the Persian, and the Roman, and the Indian, and many other tongues, the Spirit sounding within him: and the gift was called the gift of tongues because he could all at once speak divers languages. See accordingly how he both depresses and elevates it. Thus, by saying, "He that speaketh with tongues, speaketh not unto men, but unto God, for no man understandeth," he depressed it, implying that the profit of it was not great; but by adding, "but in the Spirit he speaketh mysteries" he again elevated it, that it might not seem to be superfluous and useless and given in vain.”

“For he that speaketh in an unknown tongue,.... Or with tongues, as some copies and the Ethiopic version read: Dr. Lightfoot thinks, that the Hebrew tongue, which was become a dead language, and understood but by few, is here meant, and that not without reason; seeing the public prayers, preaching, and singing of psalms among the Jews, were in this languages (x); in imitation of whom, such ministers, who had the gift of speaking this language, read the Scriptures, preached, prayed, and sung psalms in it, which were no ways to the edification of the people, who understood it not; upon which account the apostle recommends prophesying, praying, and singing, in a language that was understood: otherwise he speaketh not unto men; to the understanding, profit, and edification of men: but unto God: to his praise and glory, and he only knowing, who knows all languages, and every word in the tongue what is said; excepting himself, unless there should be any present capable of interpreting: for no man understandeth him: or "heareth him": that is, hears him, so as to understand him; he may hear a sound, but he cannot tell the meaning of it, and so it is of no use and advantage to him: howbeit in the Spirit he speaketh mysteries; though under the influence and by the extraordinary gift of the Spirit he has, and to his own Spirit and understanding, and with great affection and devotion within himself, he speaks of the deep things of God, and the mysteries of his grace, the most glorious truths of the Gospel, yet the meaning of his voice and words not being known, he is a barbarian to them that hear him; and though what he delivers are truths of the greatest importance, they are a mere jargon to others, being unintelligible. (x) Vid. Gloss. in T. Bab. Beracot, fol. 3. 1. & in Yoma, fol. 20. 2.”

“For he that speaketh in an unknown tongue - This chapter is crowded with difficulties. It is not likely that the Holy Spirit should, in the church, suddenly inspire a man with the knowledge of some foreign language, which none in the church understood but himself; and lead him to treat the mysteries of Christianity in that language, though none in the place could profit by his teaching. Dr. Lightfoot's mode of reconciling these difficulties is the most likely I have met with. He supposes that by the unknown tongue the Hebrew is meant, and that God restored the true knowledge of this language when he gave the apostles the gift of tongues. As the Scriptures of the Old Testament were contained in this language, and it has beauties, energies, and depths in it which no verbal translation can reach, it was necessary, for the proper elucidation of the prophecies concerning the Messiah, and the establishment of the Christian religion, that the full meaning of the words of this sacred language should be properly understood. And it is possible that the Hebrew Scriptures were sometimes read in the Christian congregations as they were in the Jewish synagogues; and if the person who read and understood them had not the power and faculty of explaining them to others, in vain did he read and understand them himself. And we know that it is possible for a man to understand a language, the force, phraseology, and idioms of which he is incapable of explaining even in his mother tongue. We shall see, in the course of these notes, how this view of the subject will apply to the illustration of the apostle's words throughout the chapter. Speaketh not unto men, but unto God - None present understanding the language, God alone knowing the truth and import of what he says: - In the spirit he speaketh mysteries - Though his own mind (for so πνευματι is understood here by many eminent critics) apprehends the mysteries contained in the words which he reads or utters; but if, by the spirit, we understand the Spirit of God, it only shows that it is by that Spirit that he is enabled to speak and apprehend these mysteries. See the note on Co1 14:19.”

“He that speaketh in a tongue, which others at least understand not: nay, which sometimes, perhaps, by the 14th and 15th verse, he himself that spoke tongues, did not understand, can only be said to speak to God. In spirit he speaketh mysteries, edifies himself, because in his spirit he is piously and devoutly affected; but he must endeavour that the Church, or people present, may be also edified. Let him then pray for the other gift of interpreting, what he speaks, or let another interpret. (Witham) — Not to men. Viz., so as to be heard, that is, so as to be understood by them. (Witham)”

“speaketh . . . unto God--who alone understands all languages. no man understandeth--generally speaking; the few who have the gift of interpreting tongues are the exception. in the spirit--as opposed to "the understanding" (Co1 14:14). mysteries--unintelligible to the hearers, exciting their wonder, rather than instructing them. Corinth, being a mart resorted to by merchants from Asia, Africa, and Europe, would give scope amidst its mixed population for the exercise of the gift of tongues; but its legitimate use was in an audience understanding the tongue of the speaker, not, as the Corinthians abused it, in mere display.”