7 Even things without life, giving a voice, whether pipe or harp, if they didn't give a distinction in the sounds, how would it be known what is piped or harped?
8 For if the trumpet gave an uncertain sound, who would prepare himself for war?
9 So also you, unless you uttered by the tongue words easy to understand, how would it be known what is spoken? For you would be speaking into the air.
10 There are, it may be, so many kinds of sounds in the world, and none of them is without meaning.
11 If then I don't know the meaning of the sound, I would be to him who speaks a foreigner, and he who speaks would be a foreigner to me.