How do we know that believers are one body in Christ?

The assurance of believers being one body in Christ stems from the Redemptive narrative found in Scripture. Ephesians 2:14-16 explains that Jesus is our peace, breaking down the dividing walls that separate cultures, backgrounds, and identities, thus reconciling both Jews and Gentiles. This unification by Christ's blood confirms that regardless of our previous identities, we are now one in Him, demonstrating that our oneness is rooted in His sovereign grace and purpose rather than our own efforts.