'Purified' in the Bible

According to the law almost everything is purified with blood, and without the shedding of blood there is no forgiveness.

It was therefore necessary that the patterns of things in the heavens should be purified with these; but the heavenly things themselves with better sacrifices than these.

Otherwise, wouldn’t they have stopped being offered, since the worshipers, once purified, would no longer have any consciousness of sins?

let us approach [God] with a true and sincere heart in unqualified assurance of faith, having had our hearts sprinkled clean from an evil conscience and our bodies washed with pure water.