14. for if I pray in an [unknown] tongue, my spirit doth pray, and my understanding is unfruitful.
15. What then is it? I will pray with the spirit, and I will pray also with the understanding; I will sing psalms with the spirit, and I will sing psalms also with the understanding;
16. since, if thou mayest bless with the spirit, he who is filling the place of the unlearned, how shall he say the Amen at thy giving of thanks, since what thou dost say he hath not known?
17. for thou, indeed, dost give thanks well, but the other is not built up!
18. I give thanks to my God--more than you all with tongues speaking--
19. but in an assembly I wish to speak five words through my understanding, that others also I may instruct, rather than myriads of words in an [unknown] tongue.
20. Brethren, become not children in the understanding, but in the evil be ye babes, and in the understanding become ye perfect;
21. in the law it hath been written, that, `With other tongues and with other lips I will speak to this people, and not even so will they hear Me, saith the Lord;'
22. so that the tongues are for a sign, not to the believing, but to the unbelieving; and the prophesy [is] not for the unbelieving, but for the believing,
23. If, therefore, the whole assembly may come together, to the same place, and all may speak with tongues, and there may come in unlearned or unbelievers, will they not say that ye are mad?
24. and if all may prophecy, and any one may come in, an unbeliever or unlearned, he is convicted by all, he is discerned by all,
25. and so the secrets of his heart become manifest, and so having fallen upon [his] face, he will bow before God, declaring that God really is among you.