Hebrews 10:2 - Matthew Poole's English Annotations on the Holy Bible

For then would they not have ceased to be offered? for proves the weakness of that shadowy service under the law, because it never ceased, which it would if it had perfected its users; and having reached its end, and done that work, have ceased; for these sacrifices would not of right have been repeated, neither needed they, if they could have justified and sanctified souls for ever. Because that the worshippers once purged should have had no more conscience of sins: for then this effect would have followed, the worshippers who were to be atoned for or expiated by these sacrifices, if they had perfected them, i.e. pardoned, justified, and acquitted them from guilt of sin and punishment, there would have nothing remained to have troubled, vexed, or tormented their souls, they being no further accused or condemned by their conscience about sin, God having justified and sanctified them, Hebrews 9:14,26,28; compare Romans 5:1,2,11.