The Perpetuity of Christ's Sacrifice in the Epistle to the Hebrews
Faced with the constant threat of apostasy, the author of the Epistle to the Hebrews argues that his audience must move "outside the camp" of Israel, with all its sacred associations, and find God in the person of Jesus who has inaugurated a new order of incomparable superiority. At the center of his argument is the priesthood of Jesus, since the respective value of the two covenants ultimately stands on the effectiveness of their priests. Thus, ch. 7 f the Epistle to the Hebrews stands out as the high point of the author's effort.
Brooks, Walter E. "The Perpetuity of Christ's Sacrifice in the Epistle to the Hebrews." Journal of Biblical Literature 89.2 (1970): 205-214.