In the play of Macbeth' by William Shakespeare the witches have an important effect on Macbeth, the characters, the plot, the theme and the audience. They help construct the play and without them it would have been a totally different story line. The three weird sisters influence Macbeth in his acts, they effect characters lives, orientate the plot, they are related to most of the themes and appeal the audience's attention.
The witches have a strong effect on Macbeth's character; they highly influence him in his accomplishments and awake his ambitions. They give Macbeth a false sense of security with their apparitions of truths. Instead they prove to be harmful for Macbeth who takes too much comfort and confidence in his interpretation of the truths. They are the ones who plant the actual idea of killing Duncan into Macbeth's mind. But if it were only the witches prophecies, then Macbeth surely would not have murdered the king. When you durst to do it, then you were a man,' (Macbeth, Shakespeare Act 1 Scene 7) Lady Macbeth's constant harassment pushed Macbeth and made him commit all this evil. When you reason things out by yourself you tend to now what is right and what is wrong, a conscience. But with the outside influence from the witches he thinks that that is his destiny and he must do everything to fulfill it. One can wonder if Macbeth ever had a chance of doing what was right after he met with the witches. He is overthrown and killed. Through his own ambitions, the ambition of his wife and the witches' prophesies, Macbeth has caused his own destruction and downfall. We can now clearly see that ambition not achieved through our own ability leads to destruction. 'Hail Thane of Glamis and of Cawdor and shalt be King hereafter'. (Act 1 Scene 3) These prophecies from three strangers are taken