Act 1, scene 3- “Two truths are told,
As happy prologues to the swelling act
Of the imperial theme. — I thank you, gentlemen.
Aside.
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: 140
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 imaginings:
My thought, whose murder yet is but fantastical,”

This quote shows that Macbeth thinks that he will become King because the witches have seen that he kills King Duncan.

Act 1, scene 3- “If chance will have me king, why, chance may.” Here again in act 1 scene 3, Macbeth thinks it’s fate that will make him King and that he does not need to act on it