Macbeth is responsible for putting power into the hands of Lady Macbeth and letting her influence him. Lady Macbeth tries to persuade Macbeth to kill Duncan but it is Macbeth who listens to her demands. “This night’s great business into my dispatch; / Which shall to all our nights and days to come / Give solely sovereign sway and masterdom” (I, v, 75-77). Macbeth could have told his Lady to stop her plans. Instead, he lets himself be influenced. Macbeth puts power into the hands of Lady Macbeth by letting her arrange Duncan’s murder.
Macbeth is fully aware of the consequences of his actions and is thereby liable to be blamed for his fate. Through his thoughts, actions, and decisions Macbeth demonstrates his overwhelming guilt. Macbeth’s desire to become king drives him to introduce plans for Duncan’s murder. Macbeth is aware that his thoughts are corrupt and he knows that justice will somehow punish him. However, Macbeth makes no attempt to reverse the situation and is thereby responsible for his downfall.
SUPERNATURAL
The tragic downfall of Macbeth was not determined by one single cause. It was rather caused by a combination of three forces: supernatural, lady Macbeth, Macbeth.
The very beginning of the play indicates that dark supernatural force will be involved throughout the play. Witches’ prophecies play very important role in leading Macbeth to evil deeds. Weird sisters trick Macbeth by telling one truth about The Thane of Cawdor. After this almost impossible prediction becomes true Macbeth that he should be king as well. Not only they make Macbeth thinking about murdering Duncan; they also bring him to the decision to kill Banquo and his son by saying that Banquo's children will be kings. Throughout the whole play dark supernatural powers trick and deceive Macbeth. PUT QUOTE FROM ACT IV in Act IV the apparitions playing with words convince him to continue to walk along the bloody path by advising him to be "bloody, bold, and resolute" and to "have no fear." These predictions give Macbeth confidence to murder more victims, so that he has got absolutely no hope left for retaining any virtues and opportunity of remedy.
The three witches represent supernatural forces and dark powers behind them.
The use of the supernatural occurs at the beginning of the play, with three witches predicting the fate of Macbeth.
LADY MACBETH
After the witches awaken Macbeth's desires of becoming king, his wife begins to push Macbeth towards the real act of murdering Duncan. Lady Macbeth thinks she knows exactly what Macbeth wants--becoming a king--and decides that she has to force her husband to do what he would never do without her support--to kill Duncan. She never really tries to gain much for herself and never mentions that she wants to be queen. She wants Macbeth to be king; she wants glory for him, not for herself. Lady Macbeth acts like a mother who forces her silly child to do the homework he doesn't want to do because she wants him to be successful in his life. She never questions the necessity of Macbeth becoming king and never pays attention to Macbeth's thoughts and opinion, just as mother would never care about her son's opinion about the 'stupid' homework. Macbeth's decision to "proceed no further in this business" (I.vii) was not even considered as a possible outcome by her. Lady Macbeth uses all the methods she can to convince her husband to murder Duncan. She uses Macbeth's love to her as an instrument saying that if he will not kill the king he really doesn't love her. She asks him if he is a man, tells him that he will be "so much more a man" after murdering Duncan. She gives Macbeth an example of how resolute and cruel he should be telling him that she--woman who is supposed to be kind and compassionate--would be able to kill her own child:
I would, while it [baby] was smiling in my face,
Have pluck'd my nipple from his boneless gums,
And dash'd the brains out, had I so sworn
As you have done to this.
(I.vii.61-64)