Why does Brown say that There is no good on earth; and sin is but a name. Come, devil! for to thee is this world given in the story?

This story is somewhat
allegorical in nature, where Goodman Brown represents a sort of "everyman" Christian
character (consider the Puritan honorary "Goodman" as ironic as well as
"Brown" as quite a common name). Faith, his wife, represents Christian faith in
general. Brown leaves her behind, opting to go into the woodsrepresentative of committing
sin"one [last] night, [and then he'll] cling to her skirts and follow her to Heaven."
However, faith isn't supposed to be something one has when it is convenient; Brown intentionally
walks away from Faith, and this is his first step toward moral ruin.

In the
woods, Brown repeatedly considers turning back and returning to Faith, but he never does. As he
nears the Devil's meeting of sinners in the woods, he...