13Therefore, the one who speaks in a tongue should pray that he may interpret.
14For if I pray in a tongue, my spirit prays, but my mind is unfruitful.
15What then shall I do? I will pray with my spirit, but I will also pray with my mind. I will sing with my spirit, but I will also sing with my mind.
16Otherwise, if you speak a blessing in spirit, how can someone who is uninstructed say “Amen” to your thanksgiving, since he does not know what you are saying?
17You may be giving thanks well enough, but the other one is not edified.
18I thank God that I speak in tongues more than all of you.
19But in the church, I would rather speak five coherent words to instruct others than ten thousand words in a tongue.