1 Corinthians 14:6-8

Revised Standard Version

⁶ Now, brethren, if I come to you speaking in tongues, how shall I benefit you unless I bring you some revelation or knowledge or prophecy or teaching? ⁷ If even lifeless instruments, such as the flute or the harp, do not give distinct notes, how will any one know what is played? ⁸ And if the bugle gives an indistinct sound, who will get ready for battle?