What does Ephesians 2 teach about the unity of believers?

In Ephesians 2, Paul tells believers they are no longer strangers and foreigners, but fellow citizens with the saints and members of the household of God. This unity is built upon the foundation of Christ, who through His death has reconciled all believers, creating one body in Him. This verse highlights the significance of community in the Christian faith, reflecting how all believers, regardless of their backgrounds, are brought together into one spiritual family with Jesus as the cornerstone.