The line: "False face must hide what the false heart doth know" is from William Shakespeare's play "Macbeth". Scholars tell us that in Shakespeare's Macbeth, “False face must hide what the false heart doth know” means that Macbeth must pretend to be the loyal subject of King Duncan while knowing he is going to betray and kill him. This line is specifically from from Act 1, Scene 7 of "Macbeth".

"Macbeth" is a tragedy about unchecked ambition and the destruction it can leave in its wake. Three witches tell Lord Macbeth that he will one day be king. He responds by killing the current king, seizing the throne, and killing as many threats to his reign as he can.

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