14 For if I pray in another language, my spirit prays, but my understanding is unfruitful.
15 What is it then? I will pray with the spirit, and I will pray with the understanding also. I will sing with the spirit, and I will sing with the understanding also.
16 Otherwise if you bless with the spirit, how will he who fills the place of the unlearned say the 'Amen' at your giving of thanks, seeing he doesn't know what you say?
17 For you most assuredly give thanks well, but the other person is not built up.
18 I thank my God, I speak with other languages more than you all.