In the lines from "Macbeth," Shakespeare's use of the dagger can be interpreted in several ways, but the two correct interpretations regarding its significance are:
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Macbeth’s guilt for thinking about killing the king has triggered its appearance.
This interpretation aligns with the idea that the dagger symbolizes Macbeth's inner turmoil and guilt as he contemplates the murder of King Duncan. The hallucination of the dagger reflects his psychological state and the moral conflict he experiences. -
Macbeth’s sight of the dagger, which is not actually there, indicates his insanity.
This interpretation suggests that the hallucination of the dagger indicates Macbeth's descent into madness, driven by his ambition and the violent thoughts he harbors. The fact that he can see a dagger that is not real points to his unstable mental state as he grapples with his dark intentions.
These interpretations highlight the complexities of Macbeth's character and the psychological themes prevalent in Shakespeare's work.