The Holy Spirit
The New King James Version (Chapter 12)
Our spirit language is motivated, covered, and directed by the Holy Spirit, yet it is my spirit or your spirit that is actually doing the praying.
So why does Paul say that it is his spirit praying in tongues? The Bible says in First Corinthians 6:17 that he who is joined to the Lord is one spirit. Our born-again, baptized spirit becomes united with the Holy Spirit, who has the mind of Christ and His Spirit enables us to pray from the mind of Christ and not from our natural minds.
19 And it happened, while aApollos was at Corinth, that Paul, having passed through bthe upper regions, came to Ephesus. And finding some disciples 2 he said to them, “Did you receive the Holy Spirit when you believed?”
So they said to him, c“We have not so much as heard whether there is a Holy Spirit.”
3 And he said to them, “Into what then were you baptized?”
So they said, d“Into John’s baptism.”
4 Then Paul said, e“John indeed baptized with a baptism of repentance, saying to the people that they should believe on Him who would come after him, that is, on Christ Jesus.”
5 When they heard this, they were baptized fin the name of the Lord Jesus. 6 And when Paul had glaid hands on them, the Holy Spirit came upon them, and hthey spoke with tongues and prophesied. 7 Now the men were about twelve in all.