Brothers and sisters:
Since the law has only a shadow of the good things to come,
and not the very image of them, it can never make perfect
those who come to worship by the same sacrifices
that they offer continually each year.
Otherwise, would not the sacrifices have ceased to be offered,
since the worshipers, once cleansed, would no longer
have had any consciousness of sins?
But in those sacrifices there is only a yearly remembrance of sins,
for it is impossible that the blood of bulls and goats
take away sins.
For this reason, when he came into the world, he said:
Sacrifice and offering you did not desire,
but a body you prepared for me;
in burnt offerings and sin offerings you took no delight.
Then I said, As is written of me in the scroll,
Behold, I come to do your will, O God.
First he says, Sacrifices and offerings,
burnt offerings and sin offerings,
you neither desired nor delighted in.
These are offered according to the law.
Then he says, Behold, I come to do your will.
He takes away the first to establish the second.
By this “will,” we have been consecrated
through the offering of the Body of Jesus Christ once for all.
10:1 a shadow: The sacrifices of the Law merely prefigured the perfect sacrifice of Christ (Col 2:16–17) (CCC 128). the true form: Or, “the true image”. The expression implies that the liturgy of the New Covenant, which celebrates the saving work of Christ, still utilizes visible and sacramental signs for worship. So, for example, the ceremonial “food and drink”, as well as the “baptisms” of the Levitical order (Heb 9:10), foreshadow the sacraments of the Eucharist (13:10) and Baptism (10:22) (CCC 1145–52).
10:3 reminder of sin: The annual repetition of sacrifice on the Day of Atonement (10:4; Lev 16) is evidence that the Levitical cult was not a true solution to the problem of sin (Heb 10:2). Under the Old Covenant, sins are remembered but not removed; under the New Covenant, sins are removed and thus no longer remembered (8:12; 10:17) (CCC 1539–40)
10:5–7 The Greek version of Ps 40:6–8. ● The Psalmist views the human body as an instrument of sacrifice; it was created to be offered in obedience to the will of God. This is a form of worship more pleasing to the Lord than offering the flesh and blood of animals in the Temple (1 Sam 15:22). Jesus lives out the psalm to the utmost because his sinless life as a man, totally conformed to the divine will, made the priestly offering of his body and blood the perfect sacrifice that supersedes all others (Heb 9:12; 10:10) (CCC 614, 2100). ● Four things must be considered with every sacrifice: to whom it is offered, by whom it is offered, what is offered, and for whom it is offered. Christ, the one Mediator, remained one with God, to whom he offered sacrifice, made those for whom he offered it one in himself, and acted as one in being both the one who offers and the offering (St. Augustine, On the Trinity 4, 19).
10:7 to do your will: The will of the Father was the focus of the Son’s mission in life, even to the point of death (5:8; Mk 14:36; Phil 2:8; CCC 606–7).
10:9 the first … the second: The Old Covenant and the New (8:7, 13).
“Sacrifice and offering you did not desire, but a body you prepared for me”
The Mass is the sacrifice of Christ, offered to the Father with the cooperation of the Holy Spirit—an offering of infinite value, which perpetuates the work of the Redemption in us and surpasses the sacrifices of the Old Law. The holy Mass brings us face to face with one of the central mysteries of our faith, because it is the gift of the Blessed Trinity to the Church. It is because of this that we can consider the Mass as the center and the source of a Christian’s spiritual life.
– St Josemaría Escrivá
May the virtues of faith, hope, and love go with you today – DV.
 The Ignatius Catholic Study Bible: The New Testament (San Francisco: Ignatius Press, 2010), 430.