14 For if I pray in a tongue, my spirit prays but my mind is unproductive.
1 Corinthians 14:14 Cross References - LEB
1 Corinthians 14:2
2 For the one who speaks in a tongue does not speak to people but to God, because no one understands, but by the Spirit* he speaks mysteries.
1 Corinthians 14:15-16
15 ⌊Therefore what should I do⌋*? I will pray with my spirit, but I will also pray with my mind. I will sing praise with my spirit, but I will also sing praise with my mind.
16 For otherwise, if you praise in your spirit, how will the one who fills the place of the outsider say the "amen" at your thanksgiving, because he does not know what you are saying?
1 Corinthians 14:19
19 but in the church I prefer to speak five words with my mind, in order that I may instruct other people, than ten thousand words in a tongue.