“In fact, if the bugle makes an unclear sound, who will prepare for battle? In the same way, unless you use your tongue for intelligible speech, how will what is spoken be known? For you will be speaking into the air. There are doubtless many different kinds of languages in the world, none is without meaning. Therefore, if I do not know the meaning of the language, I will be a foreigner to the speaker, and the speaker will be a foreigner to me. So also you—since you are zealous for spiritual gifts, seek to excel in building up the church.”

1Cor.14.8-12