What are Charles' and Cathy's Scars

Charles receives an injury to his forehead while working in the fields one day and the resulting scar grows darker with age, symbolizing the mark of Cain handed down by God to show his wrath for Cain's immoral behavior. Cathy sustains wounds to her forehead, too, when Mr. Edwards beats her. She wears an ugly scar for the rest of her life, indicating that she, too, lives an immoral life and has the wrath of God on her.