Ephesians 2:16

And might reconcile them both in one body unto God through the cross, having slain the enmity thereby.

Reconcile ... All of the enmity and hatred of previous class distinctions are dissolved and disappear through the creation of a new man, the Christian, who is then no longer a Jew nor a Gentile but a participant of the newness of life in Christ Jesus.

In one body ... This is equivalent to the church, the commonwealth of the new Israel, the spiritual body of Christ, the community of new creatures forming God's creation through Christ upon the earth.

Through the cross ... The centrality of the cross of Christ is an essential Christian concept. No person can be a "new man" until he is willing to forsake the old man, an act referred to by Christ as "to deny" one's self. The cross was literally the death of Christ; but for all Christians, the cross means the renunciation of self, the denial of self, followed by union with Christ, in Christ and as Christ, in which state the new man has a new life, a new name, a whole set of new value-judgments, actually a new mind, the mind of Christ.

Having slain the enmity thereby ... The instrument of Christ's triumph over sin was the cross, in which all evil, of every kind, was brought to naught, potentially at the present time, and in the absolute sense eventually.