What is the theme of this passage from Macbeth?At the beginning of the passage we see that Macbeth is standing alone in a dark hall and he suddenly...

Phantasmorgia is a recurring motif in Shakespeare's
Macbeth.  In Act II, Scene 1, Macbeth hallucinates because of his
twinges of conscience regarding the bloody course on which he is about to embark.  The
dagger points to King Duncan's chamber, causing Macbeth to ponder the murder upon his
relative and friend that he is about to commit. He hesitates as he knows that with this
deed he enters a new dimension where "Nature seems dead, and wicked dreams abuse" and
"witchcraft celebrates" as he ventures forth on the course of forcing the predictions of
the three witches to be realized.  It is at this point in the play that Macbeth answers
"the bell," of his "vaulting ambition and hears for Duncan "a knell/That summons
[Duncan] to heaven or to hell" (2.1.71-72)

This is a key
scene as Macbeth waivers in his evil course, but answers the bell of his wife and begins
his path of murder and insanity and guilt.