In act 1, scene 4, King Duncan names Malcolm to be his heir, which influences Macbeth to begin thinking about committing regicide. Macbeth acknowledges that in order to fulfill the prophecy and become king of Scotland, he must assassinate Duncan. In an aside, Macbeth says,
The prince of Cumberland! That is a step
On which I must fall down, or else o'erleap,
For in my way it lies. Stars, hide your fires;
Let not light see my black and deep desires.
The eye wink at the hand, yet let that be
Which the eye fears, when it is done, to see.
At the beginning of act 1, scene 7, Macbeth lists the numerous reasons why he should not assassinate King Duncan and admits that the only thing motivating him to commit regicide is his ambition. Macbeth says,
I have no spur
To prick the sides of my intent, but only
Vaulting ambition, which o'erleaps itself
And falls on th' other.
Following King Duncan's assassination, Macbeth desires to cement his legacy as king and begins to plan Banquo 's murder. Macbeth does not want...
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