For if the blood of bulls and of goats. — This verse connects itself with the last words of Hebrews 9:12, “having won eternal redemption,” showing why our hope may rise so high. The sacrifice is mentioned here in words slightly different from those of Hebrews 9:11; but in each case the writer’s thought is resting on the sin offering of the Day of Atonement, a bullock for the high priest himself, a goat for the people. (There is no distinct reference in this Epistle to the “scapegoat” sent into the wilderness.)
And the ashes of an heifer. — The nineteenth chapter of Numbers is wholly occupied with the remarkable institution here referred to. A red heifer without spot was slain and wholly burnt, “with cedar-wood and hyssop and scarlet,” and the ashes were laid up in a clean place without the camp. “And for the unclean they shall take of the ashes of the burning of the sin-offering, and running water shall be put thereto in a vessel: and a clean person shall take hyssop and dip it in the water and sprinkle.... upon the unclean” (Hebrews 9:17-19). The “unclean” are those that have been defiled by touching the dead body of a man, or by being in any way brought into connection with death. It is said that on the third and seventh days of the high priest’s week of preparation for the Day of Atonement (see Note on Hebrews 7:26), he was sprinkled with this water of purification, lest he should inadvertently have contracted such defilement.
Sanctifieth to the purifying of the flesh. — Better, sanctify unto the cleanness of the flesh. As we have seen already (Hebrews 9:10), the writer is looking at the intrinsic character of the sacrifices (Hebrews 10:4) and rites of purification, apart from their importance as marks of obedience or their value to those who were able to discern their spiritual lessons. They could not cleanse the conscience (Hebrews 9:9); but they could and did remove what the Law accounted “uncleanness,” and disabilities connected with the outward life and religious worship of the commonwealth.