1 Corinthians 14:6-8

Dear brothers and sisters, if I should come to you speaking in an unknown language, how would that help you? But if I bring you a revelation or some special knowledge or prophecy or teaching, that will be helpful. Even lifeless instruments like the flute or the harp must play the notes clearly, or no one will recognize the melody. And if the bugler doesn’t sound a clear call, how will the soldiers know they are being called to battle?