One in Christ: From Separation to Reconciliation
Preliminary:
1. Remember The Past (Eph. 2:11-12)
But the moment the Spirit of the Almighty strikes the heart of him that was till then without God in the world, it breaks the hardness of his heart, and creates all things new. The Sun of Righteousness appears, and shines upon his soul, showing him the light of the glory of God in the face of Jesus Christ. He is in a new world. All things round him are become new, such as it never before entered into his heart to conceive.
2. Christ is Our Peace!!! Eph. 2:13-14
What Paul is saying this this: As long as the Old Testament Law—specifically “the law [understood as] commandments expressed in ordinances” (verse 15)—was the foundation of how people are reconciled to God, the Gentiles would always be on the outside, and the Jews themselves would be alienated from God, because even for them by the works of the law no flesh will be justified (Romans 3:20).
So Paul says, Christ died to put reconciliation with God and people on a different foundation, namely, himself and his own blood. Verse 15: “He abolished the law of commandments expressed in ordinances.” And what did he put in their place as a way to be reconciled to God and to each other? Verse 16: “He reconciled us both to God in one body through the cross.”
The cross is the key. When Christ died, he covered the sins of Jew and Gentile—for all who would believe on him (Ephesians 2:8). He provided a righteousness for Jew and Gentile—for all who would believe on him. And he did this by making himself their substitute: his punishment was theirs; his righteousness is theirs—both coming to completion on the cross.