1 Corinthians 14:6-12

Amplified Bible

⁶ Now, believers, if I come to you speaking in unknown tongues, how will I benefit you unless I also speak to you [clearly] either by revelation [revealing God’s mystery], or by knowledge [teaching about God], or by prophecy [foretelling the future, speaking a new message from God to the people], or by instruction [teaching precepts that develop spiritual maturity]? ⁷ Yet even lifeless things, whether flute or harp, when producing a sound, if they do not produce distinct [musical] tones, how will anyone [listening] know what is piped or played? ⁸ And if the [war] bugle produces an indistinct sound, who will prepare himself for battle? ⁹ So it is with you, if you speak words [in an unknown tongue] that are not intelligible and clear, how will anyone understand what you are saying? You will be talking into the air [wasting your breath]! ¹⁰ There are, I suppose, a great many kinds of languages in the world [unknown to us], and none is lacking in meaning. ¹¹ But if I do not know the meaning of the language, I will [appear to] be a ^[a]foreigner to the one who is speaking [since he knows exactly what he is saying], and the one who is speaking will [appear to] be a foreigner to me. ¹² So it is with you, since you are so very eager to have spiritual gifts and manifestations of the Spirit, strive to excel in ways that will build up the church [spiritually].