6But now, brethren, if I come to you speaking with tongues, what shall I profit you unless I speak to you either by #1 Cor. 14:26; Eph. 1:17revelation, by knowledge, by prophesying, or by teaching? 7Even things without life, whether flute or harp, when they make a sound, unless they make a distinction in the sounds, how will it be known what is piped or played? 8For if the trumpet makes an uncertain sound, who will prepare for battle? 9So likewise you, unless you utter by the tongue words easy to understand, how will it be known what is spoken? For you will be speaking into the air. 10There are, it may be, so many kinds of languages in the world, and none of them is without significance. 11Therefore, if I do not know the meaning of the language, I shall be a foreigner to him who speaks, and he who speaks will be a foreigner to me. 12Even so you, since you are zealous for spiritual gifts, let it be for the edification of the church that you seek to excel. 13Therefore let him who speaks in a tongue pray that he may #1 Cor. 12:10interpret. 14For if I pray in a tongue, my spirit prays, but my understanding is unfruitful. 15What is the conclusion then? I will pray with the spirit, and I will also pray with the understanding. #Eph. 5:19; Col. 3:16I will sing with the spirit, and I will also sing #Ps. 47:7with the understanding. 16Otherwise, if you bless with the spirit, how will he who occupies the place of the uninformed say “Amen” #Deut. 27:15–26; 1 Chr. 16:36; Neh. 5:13; 8:6; Ps. 106:48; Jer. 11:5; 28:6; 1 Cor. 11:24; Rev. 5:14; 7:12at your giving of thanks, since he does not understand what you say? 17For you indeed give thanks well, but the other is not edified. 18I thank my God I speak with tongues more than you all; 19yet in the church I would rather speak five words with my understanding, that I may teach others also, than ten thousand words in a tongue.