1 Corinthians 14:14-19
14:14 If I pray in a tongue, my spirit prays, but my mind is unproductive.
14:15 What should I do? I will pray with my spirit, but I will also pray with my mind. I will sing praises with my spirit, but I will also sing praises with my mind.
14:16 Otherwise, if you are praising God with your spirit, how can someone without the gift say “Amen” to your thanksgiving, since he does not know what you are saying?
14:17 For you are certainly giving thanks well, but the other person is not strengthened.
14:18 I thank God that I speak in tongues more than all of you,
14:19 but in the church I want to speak five words with my mind to instruct others, rather than ten thousand words in a tongue.