Matthew Poole and continuators on 1 Corinthians 14:14

14 For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful .

From this and the former verse, the Papists would justifie the lawfulness of their Latine Service, which none or few of the common people understand; and they seem to have a little advantage from the Opinion of some of the Ancients, That some of those who spake with Tongues, did not themselves understand what they uttered, but the Spirit of God only made use of their Tongues as Machins. But these are apprehensions much beneath the Spirit of Light and Truth, that it should make use of the tongue of a man for an end neither profitable to the man himself, nor others. Besides, how is it then true which we had, v. 4. That he who spake in an unknown tongue, edifieth himself? Nay, how can it be true, which is here said, That such a mans Spirit prayeth? Nor is it here said, My Vnderstanding is dark or blind, but unfruitful; that is, though my self understand, yet my knowledge bringeth forth no fruit to the advantage or good of others. My Spirit prayeth, but others cannot pray with me.