What is the context?
Paul describes the response to the message of faith: confessing Jesus as Lord and believing that God raised Him from the dead. Verse 9 moves from mouth to heart; verse 10 moves from heart to mouth, connecting belief with justification and confession with salvation.
The two verses belong to Paul’s use of Deuteronomy’s language about the word being near, in the mouth and heart. He is explaining a response to the risen Jesus, not giving people a way to produce His saving work by their own effort.
How is this passage commonly understood?
Christians commonly read belief and confession here as belonging together in a real response to Christ. Faith involves trusting the risen Lord, and confession acknowledges Him. Repeating a statement without that trust does not capture the relationship between heart and mouth that Paul describes.
Where does this fit in God's plan?
In verses 12–13 Paul connects this confession with Joel 2:32, the promise that everyone calling on the Lord’s name will be saved. The confession of Jesus belongs within the scriptural promise of deliverance and Paul’s insistence that the same Lord is Lord of Jew and Greek.
What is our position?
The Gospel According to Jesus and I Am a Disciple understand belief in the risen Jesus and confession of Him as Lord as the foundation of responding to the gospel and following Him. The Gospel study describes that response as turning toward Jesus and entrusting oneself to Him, with no special wording that works as a saving formula.