The spirits of the prophets are subject to the prophets Paul writes.

The Christian can find and exercise his or her spirit.
The Christian can touch the Lord in the spirit.
The Christian can turn to the spirit.

Paul said he served the Gospel with his spirit. He knew when he was serving in his regenerated spirit.

"For God is my witness, whom I serve in my spirit in the gospel of His Son, ..." (Romans 1:9a)