1 Corinthians 14:7-12

7It is the same for lifeless things that make a sound—like a flute or a harp. If they make no distinction in the tones, how will what is played be recognized?

8For if the trumpet makes an unclear sound, who will prepare himself for battle?

9So also with you with your tongue—unless you utter speech that is intelligible, how will what is spoken be understood? For you will be talking to the wind!

10It may be that there are many kinds of languages in the world—and none without meaning.

11If then I do not understand the meaning of the language, I will be a foreigner to the speaker, and the speaker will be a foreigner to me.

12Likewise with you—since you are zealous for spiritual gifts, keep trying to excel for the building up of the community.