Hebrews 10:28-29 He that despised Moses’ law died without mercy under two or three witnesses: Of how much sorer punishment, suppose you, shall he be thought worthy, who had trodden under foot the Son of God, and had counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and had done despite unto the Spirit of grace?

‘Counted’ [Greek: hegeomai] Translated as “count” (10:29; Php. 3:7-8; 2Thess. 3:15; 1Tim. 1:12; 6:1; Jas. 1:2; 2Pet. 2:13; 3:9); “account” (2Pet. 3:15); “esteem” (Php. 2:3; 1Thess. 5:13; Heb. 11:26); “think” (Acts 26:2; 2Cor. 9:5; Php. 2:6; 2Pet. 1:13); “suppose” (Php. 2:25). If one does this to the blood of Christ he is worthy of eternal punishment.

‘He was sanctified.’ He was sanctified—not could have been, but was sanctified. This refers to personal holiness by the blood (13:12, 20; 1Jn. 1:7; Eph. 1:7; Rev. 1:5), and proves that sanctified people can apostatize to the point of final rejection of Christ and be lost.

‘Unholy thing’ The ultimate sin of apostates [Greek: koinon] is to make common or unclean. Translated as “an unholy thing” (10:29); “common” (Acts 2:44; 4:32; 10:14, 28; 11:8; Tit. 1:4; Jude 1:3); “unclean” (Rom. 14:14); and “defiled” (Mark 7:2). They count the blood of Christ a common thing, esteeming it of no value as an atonement. Once they did esteem it as the atonement or they could not have been sanctified by it; but later they became apostate, disregarding it all together as unfit to redeem.

‘Done despite’ [Greek: enubrizo] insulted.