Matthew Henry Commentary Hebrews 10:1-10

"For the law having a shadow of the good [things] to come, not the very image of the things, can never with the same sacrifices year by year, which they offer continually, make perfect them that draw nigh. Else would they not have ceased to be offered? because the worshippers, having been once cleansed, would have had no more consciousness of sins. But in those [sacrifices] there is a remembrance made of sins year by year. For it is impossible that the blood of bulls and goats should take away sins. Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, But a body didst thou prepare for me; In whole burnt offerings and [sacrifices] for sin thou hadst no pleasure: Then said I, Lo, I am come (In the roll of the book it is written of me) To do thy will, O God. Saying above, Sacrifices and offerings and whole burnt offerings and [sacrifices] for sin thou wouldest not, neither hadst pleasure therein (the which are offered according to the law), then hath he said, Lo, I am come to do thy will. He taketh away the first, that he may establish the second. By which will we have been sanctified through the offering of the body of Jesus Christ once for all." — Hebrews 10:1-10 (ASV)

The apostle, having shown that the tabernacle and ordinances of the covenant of Sinai were only emblems and types of the gospel, concludes that the sacrifices the high priests offered continually could not make the worshipers perfect regarding pardon and the purification of their consciences. But when God manifested in the flesh, became the sacrifice, and his death upon the accursed tree the ransom, then the Sufferer being of infinite worth, his free-will sufferings were of infinite value.

The atoning sacrifice must be one capable of consenting, and must of his own will place himself in the sinner's place: Christ did so. The fountain of all that Christ has done for his people is the sovereign will and grace of God. The righteousness brought in, and the sacrifice once offered by Christ, are of eternal power, and his salvation will never be abolished.

They have the power to make all who come to them perfect; they derive from the atoning blood strength, motives for obedience, and inward comfort.