Evil in "Young Goodman Brown"

Young Goodman Brown is a tale about a man named Goodman Brown who decided to go on a "journey" one night. His wife warns him off saying Pray tarry with me this night, dear husband, of all nights in the year.” It is obvious later that Faith knows that something is going on and she does not want her husband out in it. Goodman Brown doesn’t listen to his wife saying that he loves her but he has to go and he will be back by sunrise. She tells him go and prays for him.
Goodman Brown leaves off on his journey. He meets a man, who ends up being the Devil, deep in the woods where they end up at a worship service. At one point on their walk through the woods, Brown's guide says, "Evil is the nature of mankind." He is referring to Adam and Eve in the Garden of Eden. Adam wanted the forbidden knowledge, as does Brown who wants the knowledge of what will be going on that night. The staff reminds the reader of Moses turning the staff into a snake. The serpent is almost always used in reference to the devil. The Devil in the woods is enticing brown to come out join him in the communion. Faith is Eve, since she too falls under the temptation for knowledge.
I don’t think the story is saying that it is, but more like defending the story of Adam and Eve in a modern context. He talks of the Salem witch trials, a fact in our American history. It was so easy for Brown to fall under the temptation of the devil, as it was for Adam. At one point in the woods, Brown stops and says he doesn’t want to go farther in straying away from heaven and into hell. This shows that he knew what might be happening is wrong and would like to stop before the damage stops, but of course the devil is cunning and convinces him to move forward. He comes back as a sad man, never living a normal life again. Adam lived a life of bliss in Eden, then a hard/sad life on earth.