13 Therefore let one who speaks in a tongue pray that he may interpret.

14 For if I pray in a tongue, my spirit prays, but my mind is unfruitful.

15 aWhat is the outcome then? I will pray with the spirit and I will pray with the mind also; I will bsing with the spirit and I will sing with the mind also.

16 Otherwise if you bless 1in the spirit only, how will the one who fills the place of the 2ungifted say athe “Amen” at your bgiving of thanks, since he does not know what you are saying?

17 For you are giving thanks well enough, but the other person is not aedified.

18 I thank God, I speak in tongues more than you all;

19 however, in the church I desire to speak five words with my mind so that I may instruct others also, rather than ten thousand words in a tongue.

Instruction for the Church

20 aBrethren, bdo not be children in your thinking; yet in evil cbe infants, but in your thinking be mature.

21 In athe Law it is written, “bBy men of strange tongues and by the lips of strangers I will speak to this people, and even so they will not listen to Me,” says the Lord.

22 So then tongues are for a sign, not to those who believe but to unbelievers; but aprophecy is for a sign, not to unbelievers but to those who believe.

23 Therefore if the whole church assembles together and all speak in tongues, and 1ungifted men or unbelievers enter, will they not say that ayou are mad?

24 But if all aprophesy, and an unbeliever or an 1ungifted man enters, he is bconvicted by all, he is called to account by all;

25 athe secrets of his heart are disclosed; and so he will bfall on his face and worship God, cdeclaring that God is certainly among you.