89. This Melchizedek, then, have we received as a priest of God made upon the model of Christ, but the one we regard as the type, the other as the original. Now a type is a shadow of the truth, and we have accepted the royalty of the one in the name of a single city, but that of the other as shown in the reconciliation of the whole world; for it is written: “God was in Christ, reconciling the world to Himself;” that is to say, [in Christ was] eternal Godhead: or, if the Father is in the Son, even as the Son is in the Father, then Their unity in both nature and operation is plainly not denied.