Hebrews 10:1; Hebrews 10:3-4; Hebrews 10:8; Hebrews 10:11
The old system under the law of Moses was only a shadow, a dim preview of the good things to come, not the good things themselves. The sacrifices under that system were repeated again and again, year after year, but they were never able to provide perfect cleansing for those who came to worship.
But instead, those sacrifices actually reminded them of their sins year after year.
For it is not possible for the blood of bulls and goats to take away sins.
First, Christ said, “You did not want animal sacrifices or sin offerings or burnt offerings or other offerings for sin, nor were you pleased with them” (though they are required by the law of Moses).
Under the old covenant, the priest stands and ministers before the altar day after day, offering the same sacrifices again and again, which can never take away sins.