WNT(i)
6 But, brethren, as things are, if I come to you speaking in 'tongues,' what benefit shall I confer on you, if the utterance is neither in the form of a revelation nor of additional knowledge nor of prophecy nor of teaching?
7 Even inanimate things--flutes or harps, for instance--when yielding a sound, if they make no distinction in the notes, how shall the tune which is played on the flute or the harp be known?
8 If the bugle--to take another example--gives an uncertain sound, who will prepare for battle?
9 And so with you; if with the living voice you fail to utter intelligible words, how will people know what you are saying? You will be talking to the winds.