For if I pray in an unknown tongue, my spirit prays, but my understanding is unfruitful.
All Commentaries on 1 Corinthians 14:14 Go To 1 Corinthians 14
Augustine of Hippo
AD 430
For he speaks thus, when that which is said is not understood, because it cannot even be uttered, unless the images of corporeal sounds precede the oral sounds by the thought of the spirit.