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?
17. For indeed you are giving thanks well, but the other person is not edified.
18. I give thanks to God that I speak with tongues more than all of you,
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.
20. Brothers, do not become children in your understanding, but with respect to wickedness be as a child, and in your understanding be mature.
21. In the law it is written: “By those who speak a foreign language and by the lips of others I will speak to this people, and not even in this way will they obey me,” says the Lord.
22. So then, tongues are for a sign not to those who believe, but to unbelievers, but prophecy is not for unbelievers, but for those who believe.
23. Therefore, if the whole church comes together at the same time and all speak with tongues, and outsiders or unbelievers enter, will they not say that you are out of your minds?
24. But if all prophesy, and some unbeliever or outsider enters, he is convicted by all, he is judged by all,