What does the Bible say about purging sin?

According to Proverbs 16:6, iniquity is purged by mercy and truth. This purging is central to the historic Reformed understanding of salvation, emphasizing that our sinful nature is dealt with through the grace of God, specifically the blood of Jesus Christ. Sin arises from a depraved heart, and we commit sinful acts because of our sinful nature, not the other way around. It is through the attributes of God—mercy and truth—that sin is covered and atoned for, highlighting the importance of Christ's redemptive work in our lives.