Having submitted to his ambition to gain the Crown by whatever means, Macbeth murders Duncan, a guest in his castle, and thus relentlessly commits him to a career of Evil that leads him to ruin. He can never turn back and seek redemption. Once set upon his course, he moves from one act of violence to another in an effort to protect himself from inevitable disaster. Fear and hatred provoke him to plot the murder of Banquo and his son, for Banquo cannot help suspecting Macbeth's complicity in Duncan's death, and Banquo's offspring instead of ....