In Act 1 Scene 3, Macbeth says “so foul and fair a day I have not seen” this reminds the audience of the witch’s language in Act 1 Scene 1, Shakespeare uses this saying to show that Macbeth is evil and it associates him with the witch’s and says that he is similar to them. Also in this scene the witch’s give an insight of what is to become of Macbeth;
“All hail, Macbeth! Hail to thee, Thane of Glamis!”
“All hail, Macbeth! Hail to thee, Thane of Cawdor!”
“All hail, Macbeth – that shalt be the king hereafter!”
As this scene only gives an insight of what the witch’s have predicted, it is clear that they were not the driving force behind King Duncan’s murder. However it shows that they influenced Macbeth’s ambition to get the title, as he was unaware of what his future held. In saying that the witches did however give him a reason for the thoughts he later started to have in the play, which made it seem as if the witches had given him the ammo he need to commit his regicide. As the scene carries on, Macbeth asks the withes to give him more information “Stay, you imperfect speakers! Tell me more”, this shows how impatient Macbeth is, which makes it seem as though, he wants to know how he is going to achieve his power.
Lady Macbeth starts to corrupt Macbeths mind, “I fear thy nature; it is too full of the milk of human kindness”, here she is saying that he has become soft and his kindness has inflicted him to become somewhat of a coward. Macbeth in Act 1 Scene 7 has decided to reconsider his pervious thoughts about killing the king; “If th’ assassination could trammel up the consequences, and catch with his surcease - that but this blow might be the be-all and the end-all here, but here, upon this bank and shoal of time, we’d jump the life to come”. Macbeth in this scene starts to talk about the afterlife “upon this bank and shoal of time”, it shows that he is scared of the consequences of which killing the king would occur. Lady Macbeth starts to accuse Macbeth of going back on his word again “I have given suck and I know” and then accuses him of being unmanly “I would, while it was smiling in my face, have plucked my nipple from his boneless gums and dashed the brains out, had I so sworn” this makes her seem as though she is more of a man than Macbeth. She always starts to question Macbeths love for her and says she will do the deed herself, this troubles Macbeth, and makes him think he has to prove his love to her by committing this regicide and also the fact that he wouldn’t want his wife to do it for him.
In conclusion to this, there are many reasons behind as to why Macbeth committed such a deed, firstly there are the Witches, who tended his ambition with predictions of his future and what fortune it would bring him, and secondly there was his on greed in becoming more then what he was “ Thane of Glamis” , “Thane of Cawdor” and thirdly, Lady Macbeth. She was the enforcer behind it, and the person that gave Macbeth more of a reason to commit regicide. She was his downfall, her questioning and doubting his manly hood and love for her was the unspeakable force that led him to the death of King Duncan. Throughout the play Shakespeare tries to get us to believe that it was only the witches and Macbeths own ambition that caused the death of the king. He does this by making the reader know what is to expected of Macbeth through the witches (Act 1 Scene 3, lines 49-51), also Shakespeare attempts to engineer all the blame onto Macbeth by making it seem like he’s ambition from the start was to kill King Duncan. However Shakespeare doesn’t hide the fact that Lady Macbeth has her on ambition and dreams for her husband, her ambition comes through and projects onto Macbeth, causing him to doubt his manly hood and kings men ship .