17. But if you give thanks with spiritual voices only, in a language unknown to those who fill the place of the humble listeners and the congregation, however well you do it, the church is not fulfilled and is not edified.
18. My brethren, this language of the Spirit utters itself richly in me, and in more frequent and fuller tones than in all of you,
19. yet would I rather speak five words with the understanding that can help my brother than ten thousand in a language which he does not know.
20. My brethren, you have become as little children in this world, but be not children in understanding, but children only in evil. This speaking with tongues, you say, is a sign, a miracle.
21. Yes, God says, “With other lips and a strange tongue will I speak to this people, and yet will they not hearken to me.” (Is. xxviii. 11-12)
22. They are a sign to those who have no faith, and a sign that is not accepted.