1 Corinthians 14:14

For, if I am praying in a tongue, my spirit, is praying, but, my mind, is unfruitful.

1 Corinthians 14:2

For, he that speaketh with a tongue, not unto men, doth speak, but, unto God, - for, no one, understandeth, although, in spirit, he is speaking sacred secrets;

1 Corinthians 14:15-16

What is it then? I will pray with the spirit, but I will pray also with the mind, - I will strike the strings with the spirit, butI will strike the strings also with the mind.

1 Corinthians 14:19

But, in assembly, I desire to speak five words with my mind, that, others also, I may instruct, than myriads of words in a tongue.

Treasury of Scripture Knowledge

Summary

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

My spirit

Bible References

My spirit

1 Corinthians 14:2
For, he that speaketh with a tongue, not unto men, doth speak, but, unto God, - for, no one, understandeth, although, in spirit, he is speaking sacred secrets;