1 Corinthians 14:9-11

New Century Version

⁹ It is the same with you. Unless you speak clearly with your tongue, no one can understand what you are saying. You will be talking into the air! ¹⁰ It may be true that there are all kinds of sounds in the world, and none is without meaning. ¹¹ But unless I understand the meaning of what someone says to me, we will be like foreigners to each other.