1 Corinthians 14:6-13

Brothers and sisters, will it help you if I come to you speaking in different languages? No! It will help you only if I bring you a new truth or some new knowledge, or prophecy, or teaching. It is the same as with lifeless things that make sounds—like a flute or a harp. If they do not make clear musical notes, you will not know what is being played. And in a war, if the trumpet does not give a clear sound, who will prepare for battle? It is the same with you. Unless you speak clearly with your tongue, no one can understand what you are saying. You will be talking into the air! It may be true that there are all kinds of sounds in the world, and none is without meaning. But unless I understand the meaning of what someone says to me, we will be like foreigners to each other. It is the same with you. Since you want spiritual gifts very much, seek most of all to have the gifts that help the church grow stronger. The one who has the gift of speaking in a different language should pray for the gift to interpret what is spoken.