12. Wherefore Jesus--In order that the Antitype might fulfil the type.
      sanctify--Though not brought into the temple "sanctuary" (Heb 13:11) His blood has been brought into the heavenly sanctuary, and "sanctifies the people" (Heb 2:11, 17), by cleansing them from sin, and consecrating them to God.
      his own--not blood of animals.
      without the gate--of Jerusalem; as if unworthy of the society of the covenant-people. The fiery ordeal of His suffering on the cross, answers to the burning of the victims; thereby His mere fleshly life was completely destroyed, as their bodies were; the second part of His offering was His carrying His blood into the heavenly holiest before God at His ascension, that it should be a perpetual atonement for the world's sin.

JFB.