1 Corinthians 14:9-12

So if you speak in a way no one can understand, what’s the point of opening your mouth? There are many languages in the world and they all mean something to someone. But if I don’t understand the language, it’s not going to do me much good. It’s no different with you. Since you’re so eager to participate in what God is doing, why don’t you concentrate on doing what helps everyone in the church?