11. The Apostle, having established the superior excellence of the priesthood of Christ over that of Aaron, now proceeds to refute the error of the Hebrews regarding the efficacy and permanency of the Aaronic priesthood. In the supposition, that the priesthood of Aaron caused justification, the institution of another order of priesthood would he quite useless; hence, as God instituted another order of priesthood, after the rite of Melchisedech, this must not be useless; and consequently the priesthood
Hebrews 7:11–14