15 What is it then? I will pray with the spirit, I will pray also with the understanding; I will sing with the spirit, I will sing also with the understanding.
16 Else if thou shalt bless with the spirit, how shall he that holdeth the place of the unlearned say, Amen, to thy blessing? because he knoweth not what thou sayest.
17 For thou indeed givest thanks well, but the other is not edified.
18 I thank my God I speak with all your tongues.
19 But in the church I had rather speak five words with my understanding, that I may instruct others also; than ten thousand words in a tongue.
20 Brethren, do not become children in sense: but in malice be children, and in sense be perfect.
21 In the law it is written: In other tongues and other lips I will speak to this people; and neither so will they hear me, saith the Lord.