6 Now, brothers and sisters, if I come to you speaking in tongues, how will I benefit you unless I speak to you in some revelation or knowledge or prophecy or teaching? 7 It is the same way with lifeless instruments that produce sound, such as the flute or the harp. If they do not give distinct notes, how will anyone know what is being played? 8 And if the bugle gives an indistinct sound, who will get ready for battle? 9 So with yourselves; if in a tongue you utter speech that is not intelligible, how will anyone know what is being said? For you will be speaking into the air. 10 There are doubtless many different kinds of sounds in the world, and nothing is without sound. 11 If then I do not know the meaning of a sound, I will be a foreigner to the speaker and the speaker a foreigner to me. 12 So with yourselves; since you are eager for spiritual gifts, strive to excel in them for building up the church. 13 Therefore, one who speaks in a tongue should pray for the power to interpret. 14 For if I pray in a tongue, my spirit prays but my mind is unproductive.
Matthew Henry's Commentary on 1 Corinthians 14:6-14
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.