People have a hard time getting what they want. Shakespeare's Macbeth did the unthinkable to get what he desired. He not only committed the treasonable act of regicide, but he murdered his friend Banquo, and slaughtered the wife and children of Macduff. The honorable status of a noble war hero was not enough for him after receiving the prophecies from the evil witches. Once prophesied to become king, Macbeth became unworthy of his nobility and lost control of himself in a frenzied desire to become the King of Scotland. If Macbeth's ambitious pursuit for power and gratefulness led to the decline in security and happiness, then it was his lack of control over his desires and Lady Macbeth's persuasion that led to his ultimate destruction. .
It is human nature to always want more then what your have. Lead by his wife's poetic persuasion, Macbeth realizes his own "black and deep desires" (I, iv, 48-51). He realizes he wants to be king, but is the same time is resistant to his wife's visions of murder. It's not only the power that drives him to be king, but the sense of security and 'greatness'. These feelings are lost for both Macbeth and Lady Macbeth once he gains the throne. Macbeth lacks all necessary characteristics of a king, particularly the glory that coincides with it. As Brian Morris explains, "his desire is not for command over others or for some position from which he can decisively influence the onward course of events, but for personal distinction, recognized and conceded by his society". Yielding to Lady Macbeth's questioning of his manhood and love for her, Macbeth murders Duncan. After he commits the murder he says, "To know my deed, 'twere best not know myself" (II, ii, 6-7). Knowing that he has just committed such a horrible crime makes him uncomfortable. Gaining power causes discomfort. When trying to gain power, people sometimes find themselves filled with guilt and paranoia.