Otherwise, wouldn't they have stopped being offered, since the worshipers, once purified, would no longer have any consciousness of sins?
Hebrews 10:2 In-Context
The law is only a shadow of the good things that are coming—not the realities themselves. For this reason it can never, by the same sacrifices repeated endlessly year after year, make perfect those who draw near to worship.
Otherwise, would they not have stopped being offered? For the worshipers would have been cleansed once for all, and would no longer have felt guilty for their sins.
But those sacrifices are an annual reminder of sins.
It is impossible for the blood of bulls and goats to take away sins.
Therefore, when Christ came into the world, he said: “Sacrifice and offering you did not desire, but a body you prepared for me;