Charles Ellicott Commentary Hebrews 10:2

"Else would they not have ceased to be offered? because the worshippers, having been once cleansed, would have had no more consciousness of sins." — Hebrews 10:2 (ASV)

For then.—Better, otherwise. The very repetition of the annual ceremonial was a testimony to its imperfection. The idea of repetition has been very strikingly brought out in Hebrews 10:1.

Once purged.—Better, because the worshippers, having been once cleansed, would have no more consciousness of sins. “Worshippers,” not the same word as in Hebrews 10:1, but similarly used in Hebrews 9:9; Hebrews 9:14; Hebrews 12:28 (Philippians 3:3, and others): in Hebrews 8:5; Hebrews 13:10, it is applied to priestly service.