Hebrews 9:13

PROOF OF AND ENLARGEMENT ON, THE "ETERNAL REDEMPTION" MENTIONED IN Heb 9:12. (Heb. 9:13-28) if--as we know is the case; so the Greek indicative means. Argument from the less to the greater. If the blood of mere brutes could purify in any, however small a degree, how much more shall inward purification, and complete and eternal salvation, be wrought by the blood of Christ, in whom dwelt all the fulness of the Godhead? ashes of an heifer-- (Num 19:16-18). The type is full of comfort for us. The water of separation, made of the ashes of the red heifer, was the provision for removing ceremonial defilement whenever incurred by contact with the dead. As she was slain without the camp, so Christ (compare Heb 13:11; Num 19:3-4). The ashes were laid by for constant use; so the continually cleansing effects of Christ's blood, once for all shed. In our wilderness journey we are continually contracting defilement by contact with the spiritually dead, and with dead works, and need therefore continual application to the antitypical life-giving cleansing blood of Christ, whereby we are afresh restored to peace and living communion with God in the heavenly holy place. the unclean--Greek, "those defiled" on any particular occasion. purifying--Greek, "purity." the flesh--Their effect in themselves extended no further.

— Jamieson-Fausset-Brown Commentary (public domain)