“We are saved by God from God through God to God for God. The idea of our salvation is the Father’s; the work of our salvation is the Son’s; the dispensing of our salvation is the Spirit’s. So that in all things God will get the glory.”
– Jared Wilson, Gospel Deeps: Reveling in the Excellencies of Jesus
It’s single-handedly God.
While I may not completely agree with the exact wording and thought process as Mr. Wilson, I do 100% agree that salvation is ALL God.