Ephesians 2:16

Since then it was impossible that our life, which had been estranged from God, should of itself return to the high and heavenly place, for this cause, as saith the Apostle, He Who knew no sin is made sin for us, and frees us from the curse by taking on Him our curse as His own, and having taken up, and, in the language of the Apostle, "slain" in Himself "the enmity" which by means of sin had come between us and God,-(in fact sin was "the enmity")-and having become what we were, He through Himself again united humanity to God. For having by purity brought into closest relationship with the Father of our nature that new man which is created after God, in Whom dwelt all the fulness of the Godhead bodily, He drew with Him into the same grace all the nature that partakes of His body and is akin to Him.

"And might reconcile them both in one body unto God through the Cross." He saith, not merely "might reconcile," but "might reconcile thoroughly" indicating that heretofore human nature had been easily reconciled, as, e.g., in the case of the saints and before the time of the Law. "In one body," saith he, and that His own, "unto God." How is this effected? By Himself, he means, suffering the due penalty. "Through the cross having slain the enmity thereby." Nothing can be more decisive, nothing more expressive than these words. His death, saith the Apostle, hath "slain" the enmity. He hath "wounded" and "killed" it, not by giving charge to another, nor by what He wrought only, but also by what He suffered. He does not say "having dissolved," he does say "having cancelled," but what is stronger than all, "having slain," so that it never should rise again. How then is it that it does rise again? From our exceeding depravity. For as long as we abide in the body of Christ, as long as we are united, it rises not again, but lies dead; or rather that former enmity never rises again at all. But if we breed another, it is no longer because of Him, who hath destroyed and put to death the former one. It is thou, forsooth, that travailest with a fresh one. "For the mind of the flesh," saith he, "is enmity against God;" if we are in nothing carnally-minded, there will be no fresh enmity produced, but that "peace" shall remain.

When he states "and might reconcile both to God in one body," he discloses how both draw near to God. Concerning this he does two things: First, he treats of their reconciliation to God. Secondly, he writes of the manifestation of this reconciliation (2:17). It …

He did not say "reconcile" (καταλλάξη), but "fully reconcile" (άποκαταλλάξη), that is, reconcile again, showing that in ancient times too, through the law, human nature was being reconciled with God, but then, since through the transgression of the law the enmity was even more intensified, …

And hath broken down the middle wall of partition - Alluding to that wall of old, which separated the court of Israel from the court of the gentiles. Such a wall was the ceremonial law, which Christ had now taken away.