The Mystery Revealed: Gentiles as Fellow Heirs
Paul describes himself as a prisoner of Christ Jesus for the Gentiles and explains the “mystery” made known to him by revelation. The content is stated plainly in verse 6: Gentiles are fellow heirs, fellow members of the same body, and fellow sharers in the promise in Christ Jesus through the gospel.
Where this fits in the story: the blessing of the nations promised in the Abrahamic story and developed through Israel’s prophets reaches a decisive canonical stage. What earlier Scripture anticipated is now clarified by apostolic revelation: Gentiles share the inheritance in the Messiah as members of the same body.