John Gill's Bible Commentary Ver. 9. Then said he, [lo], I come to do thy will, O God , etc..] (See Gill on Hebrews 10:7) he taketh away the first, that he may establish the second ; the sense is, either that God has taken away, and abolished the law, that he might establish the Gospel; or he has caused the first covenant to vanish away, that place might be found for the second, or new covenant; or he has changed and abrogated the priesthood of Aaron, that he might confirm the unchangeable priesthood of Christ; or rather he has taken away that which was first spoken of in the above citation, namely, sacrifice, offering, burnt offerings, and sin offerings; these he has removed and rejected as insignificant and useless, that he might establish what is mentioned in the second place; namely, the will of God, which is no other than the sacrifice of Christ, offered up according to the will of God, and by which his will is done.
Matthew Henry Commentary
Verses 1-10 - The apostle having shown that the tabernacle, and ordinances of the covenant of Sinai, were only emblems and types of the gospel, conclude that the sacrifices the high priests offered continually, could no make the worshippers perfect, with respect to pardon, and the purifyin of their consciences. But when "God manifested in the flesh," becam the sacrifice, and his death upon the accursed tree the ransom, the 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' stead: Christ did so. The fountain of all that Christ has done for his people, is the sovereign will and grace of God. The righteousnes brought in, and the sacrifice once offered by Christ, are of eterna power, and his salvation shall never be done away. They are of power to make all the comers thereunto perfect; they derive from the atonin blood, strength and motives for obedience, and inward comfort.
Greek Textus Receptus
τοτε 5119 ADV ειρηκεν 2046 5758 V-RAI-3S-ATT ιδου 2400 5628 V-2AAM-2S ηκω 2240 5719 V-PAI-1S του 3588 T-GSM ποιησαι 4160 5658 V-AAN ο 3588 T-NSM θεος 2316 N-NSM το 3588 T-ASN θελημα 2307 N-ASN σου 4675 P-2GS αναιρει 337 5719 V-PAI-3S το 3588 T-ASN πρωτον 4413 A-ASN ινα 2443 CONJ το 3588 T-ASN δευτερον 1208 A-ASN στηση 2476 5661 V-AAS-3S
Vincent's NT Word Studies
9. He taketh away the first that he may establish the second.Removes that which God does not will, the animal sacrifice, that he may establish that which God does will, the offering of an obedient will.