3 But who is it that has had fellowship with us in the matter of food? Whether is it he who is conceived of by them as the Christ above, who extended himself through Horos, and imparted a form to their mother; or is it He who is from the Virgin, Emmanuel, who ate butter and honey, of whom the prophet declared, “He is also a man, and who shall know him?” He was likewise preached by Paul: “For I delivered,” he says, “unto you first of all, that Christ died for our sins, according to the Scriptures; and that He was buried, and rose again the third day, according to the Scriptures.” It is plain, then, that Paul knew no other Christ besides Him alone, who both suffered, and was buried, and rose gain, who was also born, and whom he speaks of as man.
For after remarking, “But if Christ be preached, that He rose from the dead,” he continues, rendering the reason of His incarnation, “For since by man came death, by man [came] also the resurrection of the dead.” And everywhere, when [referring to] the passion of our Lord, and to His human nature, and His subjection to death, he employs the name of Christ, as in that passage: “Destroy not him with your meat for whom Christ died.” And again: “But now, in Christ, you who sometimes were far off are made near by the blood of Christ.” And again: “Christ has redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangs upon a tree.” And again: “And through your knowledge shall the weak brother perish, for whom Christ died;” indicating that the impassible Christ did not descend upon Jesus, but that He Himself, because He was Jesus Christ, suffered for us; He, who lay in the tomb, and rose again, who descended and ascended,— the Son of God having been made the Son of man, as the very name itself does declare.
For in the name of Christ is implied, He that anoints, He that is anointed, and the unction itself with which He is anointed. And it is the Father who anoints, but the Son who is anointed by the Spirit, who is the unction, as the Word declares by Isaiah, “The Spirit of the Lord is upon me, because He has anointed me,” — pointing out both the anointing Father, the anointed Son, and the unction, which is the Spirit.
Source: Adversus haereses (New Advent)