Personal desire can cause a man to do horrible things. Once he desires something such as power, he will likely go to any extent to achieve it. In the beginning of Macbeth, three witches predict futures for Banquo and Macbeth. When Macbeth discovers that he shall be thane of Cawdor he believes it to be a temptation. Soon after, when he is officially named thane of Cawdor, Macbeth realizes that the witches might be right. "...Two truths are told/As happy prologues to the swelling act/...This supernatural soliciting/Cannot be ill, cannot be good. If ill,/ Why hath is given me earnest of success/...If good, why do I yield to that suggestion." At this moment he is thinking about murdering Duncan but decides that he would be unable to do it. As the play moves forward his desire increases. He wants the power. He is not fine with Duncan being king anymore.
When Macbeth doesn’t want Duncan to be king anymore he king because he wants the power. Then he starts killing more people. He kills Banquo and his family. Then he kills Macduff. The only reason I think he keeps killing and wanting power. Because ever time he would see the witches they would tell him more what would happen. Instead of changing it that way it wouldn’t be true he did what they said was going to happen. He let his desire get control of