What does the Bible say about uncleanness and sin?

In Scripture, particularly the Old Testament, uncleanness was often associated with certain physical conditions or ceremonial laws, as discussed in Leviticus 15. These laws highlighted the reality of sin, indicating that being unclean affects our ability to engage in worship and fellowship with God. It serves as a constant reminder of our sinful state—both from our actions and the corruption of our hearts. This truth emphasizes how sin not only contaminates us externally but is rooted deep within our nature, leaving us in need of spiritual cleansing and redemption through Christ.