Answer:
In Act 3 Scene 4 of Macbeth, after the appearance of Banquo's ghost during a banquet, Macbeth says: "Thou canst not say I did it. Never shake/ Thy gory locks at me." This quote shows that Macbeth is losing his grip on reality and is starting to feel guilty about his actions, as he is addressing the ghost of Banquo who he had murdered earlier.
Step-by-step explanation: