In this section of Hebrews, the writer makes his final argument to Hebrews believers of the first-century, and us, that perfect salvation and atonement for sins can only be given by Christ's one offering of Himself. Christ perfects forever them that are sanctified. The word perfect speaks to the atonement of Christ, that only His offering can save us to the uttermost, which none of the Old Covenant offerings and sacrifices could do.