Final answer:
Heck Tate's phrase "Let the dead bury the dead" in 'To Kill a Mockingbird' implies that some matters, particularly those concerning those who are gone, should be left to rest to prevent further harm.
Step-by-step explanation:
The phrase "Let the dead bury the dead" is uttered by Heck Tate in Harper Lee's classic novel To Kill a Mockingbird. This metaphorical statement, which originates from the Bible, is Heck Tate's way of suggesting that they should not disturb or cause more harm to those who are already gone, meaning they should leave things as they are without creating additional harm or seeking revenge. Its use in the book touches upon themes of justice, morality, and the necessity to sometimes overlook certain truths for the greater good.