16. After all, if you praise God in the Spirit, how will the people who aren’t trained in that language say "Amen!" to your thanksgiving, when they don’t know what you are saying?
17. You may offer a beautiful prayer of thanksgiving, but the other person is not being built up.
18. I thank God that I speak in tongues more than all of you.
19. But in the church I’d rather speak five words in my right mind than speak thousands of words in a tongue so that I can teach others.
20. Brothers and sisters, don’t be like children in the way you think. Well, be babies when it comes to evil, but be adults in your thinking.
21. In the Law it is written: I will speak to this people with foreign languages and foreigners’ lips, but they will not even listen to me this way, says the Lord.
22. So then, tongues are a sign for those who don’t believe, not for those who believe. But prophecy is a sign for believers, not for those who don’t believe.
23. So suppose that the whole church is meeting and everyone is speaking in tongues. If people come in who are outsiders or unbelievers, won’t they say that you are out of your minds?
24. But if everyone is prophesying when an unbeliever or outsider comes in, they are tested by all and called to account by all.
25. The secrets of their hearts are brought to light. When that happens, they will fall on their faces and worship God, proclaiming out loud that truly God is among you!
26. What is the outcome of this, brothers and sisters? When you meet together, each one has a psalm, a teaching, a revelation, a tongue, or an interpretation. All these things must be done to build up the church.
27. If some speak in a tongue, then let two or at most three speak, one at a time, and someone must interpret.
28. However, if there is no interpreter, then they should keep quiet in the meeting. They should speak privately to themselves and to God.
29. In the case of prophets, let two or three speak and have the rest evaluate what is said.
30. And if some revelation comes to someone else who is sitting down, the first one should be quiet.
31. You can all prophesy one at a time so that everyone can learn and be encouraged.
32. The spirits of prophets are under the control of the prophets.