16. Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me. For if l pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful. Else when thou shalt bless with the spirit, how shall he that occupieth the room of the unlearned say Amen at thy giving of thanks, seeing he understandeth not what thou sayest? For thou verily givest thanks well, but the other is not edified (I Corinthians, 14: 11, 14, 16 & 17).