Macbeth's internal conflicts manifest themselves early in the play.
In act 1, scene 3, when the Witches prophesize "...hail to thee, Thane of Cawdor!" and "All hail, Macbeth, that shalt be King hereafter! "(1.3.51–52, 53), long-suppressed ambitions begin to stir inside Macbeth.
Later in the scene when Ross announces that King Duncan has declared Macbeth Thane of Cawdor—which serves to gives credence to the prophecies—Macbeth's ambitions to acquire the throne of Scotland move to the top of his thoughts. He debates with himself about pursuing his ambitions, and the audience learns that this isn't the first time that Macbeth has had these thoughts:
MACBETH. This supernatural soliciting
Cannot be ill, cannot be good. If ill,
Why hath it given me earnest of success,
Commencing in a truth? I am Thane of Cawdor.
If good, why do I yield to that suggestion
Whose horrid image doth unfix my hair
And make my seated heart knock at my ribs,
Against the use of nature? Present fears
Are less than horrible...
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