Necessary but not sufficient

The same new Testament writers who use new-covenant language also use the language of sacrifice. forgiveness of sins via the sacrifice of Christ is an essential, but not a sufficient, dimension of an atonement model rooted in the New Testament texts. To suggest that the new-covenant model and the sacrificial model are mutually exclusive would be to ignore the evidence of the New Testament itself. The prophetic promise of a forgiven covenantal people is realized in the sacrificial death of Christ.— The Death of the Messiah and the Birth of the New Covenant, page 225