"When you look into the abyss, the abyss looks into you"

To me, this quote means, sometimes when you look down at evil, you see yourself. When you look in the murky dirty water, you see your reflection! This relates to Goodman Brown because once he went into the woods which substitutes for the abyss, he changed! The woods brought out a side of him he didn’t realize he had! He now sees what he truly believes in and how he honestly feels.