Paul is saying to those who speak in tongues, which apparently he wants everyone to do, to make themselves intelligible. There is an isolated and private part to all of us which can only be shared with God. This most intimate aspect of who we are should not create a sense of isolation – as if we cannot get outside of ourselves so as to share with others the deepest part of who we are. We should see this private interiority as the place God meets us with a word about which we tell others.
Preached by Paul Axon.