By killing Duncan Macbeth is named king of Scotland and achieve what he always wanted, later on he becomes suspicious of his best friend Banquo and murders him as well. Macbeth keeps on becoming darker and darker and would do anything to keep his happiness and people from interfering with him.
After killing Duncan Macbeth feels guilt for his actions and that “no ocean could ever watch off his bloody hands”. Only later on he kills his best friend Banquo because he thinks he know the truth behind King Duncan's death. The author empires how Macbeth would go really far to keep the way things are including murdering everyone that interferes in his path.
At this state Macbeth finally puts his guilt and enters his dark stage and starts to kill anyone of suspicion, as a result, Macduff’s family. Unfortunately Macbeth at this point has given up and thinks he’s lived a good enough life and wouldn’t mind to be laid to rest. William Shakespeare shows how Macbeth who was once honored to beside King Duncan has now committed great sins for his own selfishness. At the end Macbeth finally realises that he was wrong doing and only taking advantage of other people.
One of the main reasons Macbeth felt it was necessary to kill King