3 But he who prophesies speaks to men for their edification and exhortation and comfort.
4 He who speaks in an unknown tongue edifies himself, but he who prophesies edifies the church.
5 I desire that you all speak in tongues, but even more that you prophesy. For greater is he who prophesies than he who speaks in tongues, unless he interprets, so that the church may receive edification.
6 Now, brothers, if I come to you speaking in tongues, what shall I profit you, unless I speak to you by revelation or knowledge or prophesying or doctrine?
7 Even when things without life give sound, whether flute or harp, how will it be known what is played unless they give a distinction in the sounds?
8 If the trumpet makes an uncertain sound, who will prepare himself for the battle?
9 So also you, unless with the tongue you speak words easy to understand, how will it be known what is spoken? For you shall speak into the air.