1 Corinthians 14:6-8

6My Christian friends, if I come to visit you, then I want to help you. But if I speak to you in languages that you do not understand, that will not help you at all. I would need to explain to you what God has shown to me. I would need to help you to understand something. I would need to speak a clear message from God, or teach you something. Only that would help you.

7Think about how people make music with flutes or harps. Those things are not alive. We have to use them to make clear sounds. If we do not use them properly, then nobody can recognize the music.

8Soldiers will not prepare to fight unless they hear a clear sound from the trumpet.