17. For thou indeed givest thanks well, but the other is not edified.
18. I thank God I speak in a tongue more than all of you:
19. but in the assembly I desire to speak five words with my understanding, that I may instruct others also, rather than ten thousand words in a tongue.
20. Brethren, be not children in your minds, but in malice be babes; but in your minds be grown men.
21. It is written in the law, By people of other tongues, and by strange lips, will I speak to this people; and neither thus will they hear me, saith the Lord.
22. So that tongues are for a sign, not to those who believe, but to unbelievers; but prophecy, not to unbelievers, but to those who believe.