10:1-10 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 worshippers perfect, with respect to pardon, and the purifying 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 stead: 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 shall never be done away. They are of power to make all the comers thereunto perfect; they derive from the atoning blood, strength and motives for obedience, and inward comfort.

10. By—Greek, "In." So "in," and "through," occur in the same sentence, 1Pe 1:22, "Ye have purified your souls in obeying the truth through the Spirit." Also, 1Pe 1:5, in the Greek. The "in (fulfilment of) which will" (compare the use of in, Eph 1:6, "wherein [in which grace] He hath made us accepted, in the Beloved"), expresses the originating cause; "THROUGH the offering … of Christ," the instrumental or mediatory cause. The whole work of redemption flows from "the will" of God the Father, as the First Cause, who decreed redemption from before the foundation of the world. The "will" here (boulema) is His absolute sovereign will. His "good will" (eudokia) is a particular aspect of it.

are sanctified—once for all, and as our permanent state (so the Greek). It is the finished work of Christ in having sanctified us (that is, having translated us from a state of unholy alienation into a state of consecration to God, having "no more conscience of sin," Heb 10:2) once for all and permanently, not the process of gradual sanctification, which is here referred to.

the body—"prepared" for Him by the Father (Heb 10:5). As the atonement, or reconciliation, is by the blood of Christ (Le 17:11), so our sanctification (consecration to God, holiness and eternal bliss) is by the body of Christ (Col 1:22). Alford quotes the Book of Common Prayer Communion Service, "that our sinful bodies may be made clean by His body, and our souls washed through His most precious blood."

once for all—(Heb 7:27; 9:12, 26, 28; 10:12, 14).