What does the Bible say about uncleanness before God?

The scripture clearly states that all have sinned and fall short of the glory of God (Romans 3:23). Moreover, according to Isaiah 64:6, our righteous acts are like filthy rags in the sight of God. This signifies absolute moral uncleanness inherent in humanity, reinforced by passages such as Leviticus, which elaborates on the distinction between clean and unclean. God's law reveals our sinfulness and highlights our need for cleansing, as we are fundamentally unclean before His holiness.