For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.
Spirit - my higher being, the passive object of the Holy Spirit's operations, and the instrument of prayer in the unknown tongue; distinguished from the "understanding" х nous (G3563)], the active instrument of thought, which in this case must be "unfruitful" to others, since the vehicle of expression is unintelligible to them On the distinction of soul or mind and spirit, see Ephesians 4:23; Hebrews 4:12.