2 For he who speaks in another language speaks not to men, but to God; for no one understands; but in the Spirit he speaks mysteries. 3 But he who prophesies speaks to men for their edification, exhortation, and consolation. 4 He who speaks in another language edifies himself, but he who prophesies edifies the assembly. 5 Now I desire to have you all speak with other languages, but rather that you would prophesy. For he is greater who prophesies than he who speaks with other languages, unless he interprets, that the assembly may be built up.
6 But now, brothers, [1] if I come to you speaking with other languages, what would I profit you, unless I speak to you either by way of revelation, or of knowledge, or of prophesying, or of teaching? 7 Even things without life, giving a voice, whether pipe or harp, if they didn’t give a distinction in the sounds, how would it be known what is piped or harped? 8 For if the trumpet gave an uncertain sound, who would prepare himself for war? 9 So also you, unless you uttered by the tongue words easy to understand, how would it be known what is spoken? For you would be speaking into the air. 10 There are, it may be, so many kinds of sounds in the world, and none of them is without meaning. 11 If then I don’t know the meaning of the sound, I would be to him who speaks a foreigner, and he who speaks would be a foreigner to me. 12 So also you, since you are zealous for spiritual gifts, seek that you may abound to the building up of the assembly.
Matthew Henry's Commentary on 1 Corinthians 14:2-12
Commentary on 1 Corinthians 14:1-5
(Read 1 Corinthians 14:1-5)
Prophesying, that is, explaining Scripture, is compared with speaking with tongues. This drew attention, more than the plain interpretation of Scripture; it gratified pride more, but promoted the purposes of Christian charity less; it would not equally do good to the souls of men. What cannot be understood, never can edify. No advantage can be reaped from the most excellent discourses, if delivered in language such as the hearers cannot speak or understand. Every ability or possession is valuable in proportion to its usefulness. Even fervent, spiritual affection must be governed by the exercise of the understanding, else men will disgrace the truths they profess to promote.
Commentary on 1 Corinthians 14:6-14
(Read 1 Corinthians 14:6-14)
Even an apostle could not edify, unless he spoke so as to be understood by his hearers. To speak words that have no meaning to those who hear them, is but speaking into the air. That cannot answer the end of speaking, which has no meaning; in this case, speaker and hearers are barbarians to each other. All religious services should be so performed in Christian assemblies, that all may join in, and profit by them. Language plain and easy to be understood, is the most proper for public worship, and other religious exercises. Every true follower of Christ will rather desire to do good to others, than to get a name for learning or fine speaking.