These verses go back and quote a prophecy written by David in Psalm 40:6-8
"Therefore, when He comes into the world, He says,
'Sacrifice and offering You have not desired,
But a body You have prepared for Me;
In whole burnt offerings and sacrifices for sin
You have taken no pleasure.
Then I said, 'Behold, I have come
(In the scroll of the book it is written of Me)
To Do Your will, O God.'
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)
then He said, 'Behold, I have come to do Your will,'
He takes away the first in order to establish the second.
By this will we have been sanctified through the offering
of the body of Jesus once and for all."
Hmm. God does not, has not, will not desire or take pleasure in the temple sacrifices?
This is an astounding reminder from none other than King David. Rather, in the quote, "I have come to do Your will, O God," it is also translated in Psalm 40:8,
"I delight to do Your will, O my God;
Your Law is within my heart."
If you ever wondered what God takes pleasure in or desires, it is when we, like His Son, take delight in doing His will. It is only when the Law ceases to be an outward constraint, but becomes an inward constraint because it is written on our hearts. What is our heart? Webster defines it in part as "the emotion or moral nature, one's innermost being, center, the essential part." The heart simply is where love resides. To do His will, is to love, to delight to do His will. That can't happen without surrender.
Here is a silly stretch on delighting to do your will. Have you been to a Tee-ball game lately? Oh, my! We went to our baby-grands game on the twin's sixth birthday. It is parent-induced baseball, parent-controlled baseball, and delight-inducing to all watching as the children are being taught to love the game. For Ezra that meant that as he ran to first base, the chalk line was of much more interest than the arrival at first base. He ran squatting down to run his fingers through the white stripe. Then he laid down on first base and stretched out to dip his finger in the chalk and lick it off, repeatedly. The whole game he centered on that chalk as coaches constantly tried to remove him away from its allure. His delight was a chalk line. How many silly things do we set our heart upon? Yet, there was so much more to the game, good things to come.
This prophecy passes the sniff test. It truly speaks of Christ showing "He takes away the first in order to establish the second." This is what was meant when earlier in this chapter the writer says, "the good things to come."
Adam Clarke says, "'The body Thou hast prepared,' by a miraculous conception in the womb of a virgin (a prophecy of Isaiah 7:14, 'A virgin will be with child and bear a son, and she will call His name Immanuel,' and Isaiah 9:6'For a child will be born to us, a son will be given to us; And the government will rest on His shoulders; And His name will be called Wonderful Counselor, Mighty God, Eternal Father, Prince of Peace.') according to Thy word, 'The seed of the woman shall bruise the head of the serpent.'" (Genesis 3:15)
"It is remarkable that all the offerings and sacrifices which were considered to be of an atoning or cleansing nature, offered under the law, are here enumerated by the psalmist and the apostle, to show that none of them nor all of them could take away sin, and that the grand sacrifice of Christ was alone that which could do it...He takes away the law, that He may establish the Gospel."
"we have been sanctified"
"That there is no name given under heaven among men by which we can be saved, but Jesus the Christ, we believe in Him, find redemption in His blood, and are sanctified unto God..."
"We are sanctified--cleansed from guilt and consecrated to God."
"delivered from the power of sin and this evil world,
brought into fellowship with the Holy One,
and fitted for entering the Holies of All."