⁶ Now, brothers and sisters, if I come to you speaking in tongues, how will I benefit you unless I speak to you in some revelation or knowledge or prophecy or teaching?^{(A) 7} It is the same way with lifeless instruments that produce sound, such as the flute or the harp. If they do not give distinct notes, how will what is being played on the flute or harp be recognized? ⁸ And if the bugle gives an indistinct sound, who will get ready for battle?^{(B) 9} So with yourselves: If in a tongue you utter speech that is not intelligible, how will anyone know what is being said? For you will be speaking into the air.^{(C) 10} There are doubtless many different kinds of sounds in the world, and nothing is without sound. ¹¹ If then I do not know the meaning of a sound, I will be a foreigner to the speaker and the speaker a foreigner to me.^{(D) 12} So with yourselves: since you are striving after spiritual gifts, seek to excel in them for building up the church.