If I pray in an unknown tongue — The apostle, as he did at 1 Corinthians 14:6, transfers it to himself. My spirit prayeth — By the power of the Spirit I understand the words myself. But my understanding is unfruitful — The knowledge I have is no benefit to others.
Related Commentaries of 1 Corinthians 14:14
1 Corinthians 14:14
14 For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.