From today’s MP epistle:
Hebrews 10 1 For the Law, since it has only a shadow of the good things to come and not the very form of things, can never, by the same sacrifices which they offer continually year by year, make perfect those who draw near. 2 Otherwise, would they not have ceased to be offered, because the worshipers, having once been cleansed, would no longer have had consciousness of sins? 3 But in those sacrifices there is a reminder of sins year by year. 4 For it is impossible for the blood of bulls and goats to take away sins. 5 Therefore, when He comes into the world, He says,
“Sacrifice and offering You have not desired,
But a body You have prepared for Me;
6 In whole burnt offerings and sacrifices for sin You have taken no pleasure.
7 “Then I said, ‘Behold, I have come
(In the scroll of the book it is written of Me)
To do Your will, O God.’”8 After saying above, “Sacrifices and offerings and whole burnt offerings and sacrifices for sin You have not desired, nor have You taken pleasure in them” (which are offered according to the Law), 9 then He said, “Behold, I have come to do Your will.” He takes away the first in order to establish the second. 10 By this will we have been sanctified through the offering of the body of Jesus Christ once for all.
11 Every priest stands daily ministering and offering time after time the same sacrifices, which can never take away sins; 12 but He, having offered one sacrifice for sins for all time, sat down at the right hand of God, 13 waiting from that time onward until His enemies be made a footstool for His feet. 14 For by one offering He has perfected for all time those who are sanctified.
From the BCP Canon of Consecration
ALL glory be to thee, Almighty God, our heavenly Father, for that thou, of thy tender mercy, didst give thine only Son Jesus Christ to suffer death upon the Cross for our redemption; who made there (by his one oblation of himself once offered) a full, perfect, and sufficient sacrifice, oblation, and satisfaction, for the sins of the whole world;
Our Lord did not enter yearly like their high priest. After his coming he entered only once, not into the shrine which ceases, like their priesthood, but "into the Holy" of Holies of eternity, and he made a propitiation through his blood for all nations.
St. Ephraim, Commentary on the Epistle to the Hebrews
How did he become mediator? He brought words from God and brought them to us, conveying what came from the Father and adding his own death. We had offended; we ought to have died. He died for us and made us worthy of the covenant. By this is the covenant secure, in that henceforward it is not made for the unworthy.
St. John Chrysostom, On the Epistle to the Hebrews 16.2
“By this will we have been sanctified through the offering of the body of Jesus Christ once for all. … He, having offered one sacrifice for sins for all time” … The Levitical sacrifices offered annually on the Day of Atonement were but a shadow of the full, perfect and sufficient sacrifice of Jesus Christ. These sacrifices, “continually offered year after year" were unable to “make perfect those who draw near.” By the very repetition of these sacrifices there remained a consciousness of sins, a repeated reminder of sins … “For it is impossible for the blood of bulls and goats to take away sins.”
** In addition to the Day of Atonement sacrifices there were other sacrifices for sin:
the daily morning and evening sacrifices, Exodus 29:38-42
the Sabbath sacrifices, Leviticus 1ff
sacrifices for sins committed by the priests, Leviticus 4:2-12
sacrifices for unintentional sins, Leviticus 4:27-35
sacrifices for tribal leaders, Leviticus 4:22-26
sacrifices for sins committed by the congregation, Leviticus 4:13ff
With these sacrifices there remained a consciousness of sins … This is not referring to the mere awareness of sins. (The BCP makes us aware of our sin and the need for regular and daily confession: we acknowledge and bewail our manifold sins and wickedness … we have sinned by thought, word and deed … in things we have done and things left undone.) Under the Levitical sacrifices there remained a consciousness of sin, that is, the radical awareness of sin that places one under the judgment of God. Now, with the perfect sacrifice of Jesus Christ that takes away the sin of the world, there is no condemnation to them which are in Christ Jesus. Jesus’ sacrifice cleanses the conscience and purifies the soul that we may draw near to God with confidence.
Think of the design of the argument for the greater sacrifice of Jesus Christ in Hebrews 10:
Sacrifice and offering you have not desired
Whole burnt offerings and sacrifices for sin You have not desired, nor have You taken pleasure in them” (which are offered according to the Law)
But a body You have prepared for Me;
’Behold, I have come … To do Your will, O God.’”
Behold the good things that have come to us! Jesus is God’s Son in whom the Father is well pleased … This is my Body given for you! “For by one offering He has perfected for all time those who are sanctified.”
JSH+