Ephesians 2 tells us that we are now one in Christ by joining together in unity as the holy temple and dwelling place of God.
At one time, the Gentiles were called "The Uncircumcised" by those who were circumcised. Circumcision is something that physically is done by our own works, by our own hands. Gentiles were separated from Christ at that time, alienated from the commonwealth of Israel. They were strangers to the covenants that God made with Israel.
Outside of the covenants, Gentiles had no hope and were without God in the world. But now, Jesus Christ has brought hope. In Christ, those who were outside of the covenant are brought near through the blood of Jesus Christ.
He Himself is our peace. He is both the one who made us, and also the one who has broken down the dividing wall of hostility. Through the flesh of Christ we have peace.
Paul says this peace came by abolishing the law of commandments expressed in ordinances. Through abolishing the law, He might create in himself one new man in the place of two: uniting together to make peace. He came to reconcile both Jews and Gentiles unto God in one body, through the cross. Therefore, Christ killed the hostility.
Christ came and preached peace to both the Gentiles and the circumcised Jews. Through Christ, we both have access in one Spirit unto the Father! We are no longer strangers and aliens, but fellow citizens. We are united with the saints and the members of the household of God. This household built on the foundation of the apostles and prophets. Christ Himself is the cornerstone that joins the entire structure together. Being joined together, united Christians around the world form a holy temple in the Lord. In Him, we are also built together into a dwelling place for God by the Holy Spirit!
As Christians, we should ask ourselves: Do we hold to the old laws when Paul said that Christ abolished the law of works righteousness? Are we the old man, or the new man of peace that Christ created, joining together with our fellow Christians around the world? Are we part of the holy temple of God? Have we separated ourselves from the body of Christ, leaving the dwelling place of God? Or are we part of the temple and dwelling place of God by the Holy Spirit?