Macbeth has changed from a strong, courageous and ambitious nobleman at the beginning of the play to a paranoid and guilt-ridden tyrant by the end of Act III. He is now driven by a fear of being found out and a desperate desire to maintain his power.
Since the beginning of the play, Macbeth has become increasingly desperate to maintain his power and control. He has become paranoid and consumed by a fear of discovery and retribution, even going so far as to murder the innocent in order to protect himself. His ambition has become a dangerous obsession, and his courage has been replaced by a cowardly desire to avoid any possible accountability for his actions. Macbeth's transformation from a nobleman to a tyrant is complete by the end of Act III, leaving him in a state of deep turmoil and despair.
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