The Old Covenant (the Law) Could Not Do Make Men And Women Perfect. It Was a Failure As Far As Taking Away Sin Was Concerned (Hebrews 10:1-4).
Related Commentaries of Hebrews 10:1
Hebrews 10:1-4
1 For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
2 For then would they not have ceased to be offered? because that the worshippers once purged should have had no more conscience of sins.
3 But in those sacrifices there is a remembrance again made of sins every year.
4 For it is not possible that the blood of bulls and of goats should take away sins.