Beginning of Essay
Fear, this motivates us to do many things no matter if they are right or wrong. In the play Macbeth it was fear that was the main motivating factor that influenced the outcome of the play. This can be proved by the subsequent murders that followed after Duncan's, ....

Middle of Essay
.... witches' prophecies. They claimed that Macbeth would be King, but it would be Banquo's children that would follow after him. This made Macbeth very angry, he risked everything to become King and after him none of his family will follow. Only for them; and mine eternal jewel Given to the common enemy of man, To make them kings, the seeds of Banquo kings! [Act III, S I, L 72-75] Here Macbeth realizes that if something is not done to Banquo, then his sons will become King. Macbeth can't have this, he's already worried that his soul will go to hell for what he's already done. His fear become evident in this scene also, "But to be safely thus: our fears ....