If Goodman Brown’s visions come out of his own dreams, what do they tell us about him? Nathaniel Hawthorne's "Young Goodman Brown"

The main conflict of Nathaniel Hawthorne's "Young Goodman
Brown" lies in Brown's Calviinistic/Puritanical guilt which challenged by his
rebellion.  In the exposition of the story, he tells his
wife,

"of all
nights in the year, this one night must I tarry away from thee. My journey, as thou
callest it, forth and back again, must needs be done 'twixt now and
sunrise."

With "this
excellent resolve for the future," Brown feels justified in his rebellious venture. 
However, his faith is shaken as he traverses the way to the black mass.  For, he espies
his catechism teacher, Goody Cloyse, flying on a broom like a witch; Deacon Gookin, too,
passes, making a comment on how excited he is to attend the witch-meeting. And, finally,
Faith herself is there as one of the proselytes.  He cries to her to look to the heavens
and "resist the wicked one."  However, he staggers and loses all memory of what
happens.  It is then on the next day that Goodman Brown encounters Goody Cloyse who is
at her window, and Faith passes him, but he gives her no
greeting.

Interpreting the story allegorically, when
Goodman shouts at his wife Faith, he loses his own faith.  He has failed in his
rebellion and is left only with the Calvinistic sense of the depravity of man.  At the
witch-meeting, the minister, the figure of "deep and solemn tone," has declared this
Calvinistic belief, "Evil is the nature of mankind."  In his guilt, Goodman becomes
a

stern, a
sad, a darkly meditative, a distrustful, if not a desperate man...from the night of that
fearful dream.

Having lost
his faith in his night of rebellion, Goodman Brown is left only with despair and his
overriding guilt that causes him to see only the Calvinistic idea of man's depravity in
others. This is why he becomes a "hoary corpse" when he dies, who is followed, not
led, by an aged Faith.