1 Corinthians 14:4-11

4He who speaks in a tongue edifies himself, but he who prophesies edifies the church.

5I wish you all spoke with tongues, but even more that you prophesied; for he who prophesies is greater than he who speaks with tongues, unless indeed he interprets, that the church may receive edification.

6But now, brethren, if I come to you speaking with tongues, what shall I profit you unless I speak to you either by revelation, 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.