14 For if I pray in a tongue, my spirit prays, but my mind is unfruitful.
15 So what 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.
16 If you are praising God with your spirit, how can one who finds himself among
those who do not understand say "Amen" to your thanksgiving, since he does not
know what you are saying?
17 You may be giving thanks well enough, but the other man is not edified.
18 I thank God that I speak in tongues more than all of you.
19 But in the church I would rather speak five intelligible words to instruct others than
ten thousand words in a tongue.
20 Brothers, stop thinking like children. In regard to evil be infants, but in your thinking
be adults.
21 In the Law it is written: "Through men of strange tongues and through the lips of
foreigners I will speak to this people, but even then they will not listen to me," says
the Lord.
22 Tongues, then, are a sign, not for believers but for unbelievers; prophecy, however,
is for believers, not for unbelievers.
23 So if the whole church comes together and everyone speaks in tongues, and some
who do not understand or some unbelievers come in, will they not say that you are
out of your mind?
24 But if an unbeliever or someone who does not understand comes in while
everybody is prophesying, he will be convinced by all that he is a sinner and will
be judged by all,
25 and the secrets of his heart will be laid bare. So he will fall down and worship God,
exclaiming, "God is really among you!"