17 For you may be giving thanks very well, but the other is not built up.
18 I give thanks to God that I speak in tongues more than any of you,
19 but in the church I would rather speak five words with my mind, so as to instruct others also, than ten thousand words in a tongue.
20 Brothers, stop being childish in your thinking. In respect to evil be like infants, but in your thinking be mature.
21 It is written in the law:“By people speaking strange tonguesand by the lips of foreignersI will speak to this people,and even so they will not listen to me,says the Lord.”
22 Thus, tongues are a sign not for those who believe but for unbelievers, whereas prophecy is not for unbelievers but for those who believe.
23 So if the whole church meets in one place and everyone speaks in tongues, and then uninstructed people or unbelievers should come in, will they not say that you are out of your minds?