Lady Macbeth takes it a step further, claiming she could crush the skull of her infant child if she had to, showing she is capable of killing an individual if she felt that she had to (Shakespeare 1.5.362). Macbeth goes through with the murder, but is overcome with guilt. Lady Macbeth again comes in with a solutions, saying that washing Duncan's blood off of his hands will also cleanse his soul. Lady Macbeth's tactics enable Macbeth and make it seem that killing is not necessarily a bad thing if good come from it. Lady Macbeth also leads him on with her hypocritical tendencies, calling Macbeth a coward for not wanting to kill Duncan, however; she is not strong enough to kill King Duncan either, because he reminds her of her father. .
Macbeth's firm belief in the witches' prophecies give him a false sense of security and lead him to make potentially fatal mistakes, including the one that eventually leads to his death. When Macbeth first meets the witches at the end of his heroics in battle, they tell Macbeth that he will be addressed under three titles, two of which he has absolutely no idea about. He and his partner, Banquo questions the prophecies of the witches, and frankly just blow it off until Duncan's messengers echo the exact same information as the witches told them; however, the messengers have no clue that the witches exist. After the witches tell Macbeth he will be Thane of Cawdor and a future king, Ross mets Macbeth and tell his that King Duncan "bade me, from him, call thee Thane of Cawdor" giving him to good news of his new title (1.3.356). After this incident, Macbeth puts firm belief into everything they say and goes through a series of murders to make the witches' bold words his reality. He believes that if he must take the throne, he would have to rip it from the hands of King Duncan and his son, Malcolm, who was suited to replace Duncan as King. Much to the delight of his wife, Macbeth kills Duncan, frames the sons and forces them to flee England.