Overall Purpose/Theme:
The overall purpose for The Tragedy of Macbeth is to convey the message that ambition kills many and once you have the power nothing will stand in your way to earn even more power.
Evidence to support the theme:
1. Lady Macbeth reads a letter from Macbeth talking bout ho he might become king so she states. “Glamis thou art, and Cawdor, and shalt be What thou art promised. Yet do I fear thy nature; It is too full o' th' milk of human kindness to catch the nearest way. Thou wouldst be great, Art not without ambition, but without The illness should attend it” (1.5.15-20). She is showing how ambitious she is right here because Macbeth is already Thane of Glamis and Cawdor but she still wants to do something to help him become King of Scotland.
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Macbeth states “I have no spur to prick the sides of my intent, but only Vaulting ambition, which o'er leaps itself and falls on the other” (1.7.25-28). Macbeth is stating the one true reason for him to kill King Duncan Which is because then Macbeth can be even more powerful than he is now.
3. Macbeth is showing true ambition right here when he states “I am bent to know by the worst means the worst. For mine own good, all causes shall give way. I am in blood Stepped in so far that, should I wade no more, Returning were as tedious as go o’er. Strange things I have in head, that will to hand, which must be acted ere they may be scanned” (3.4.134-140). He is stating that all the things he did and is currently doing is to benefit him he isn’t even thinking about all the people he is hurting and all the families he is