The major themes in Poe's "The Fall of the House of Usher" include mortality, madness, fear, incest, friendship, and burial. Mortality is a central theme as the story involves a woman dying and being buried only to rise from the grave. Madness is explored through the narrator noting inconsistencies in Roderick Usher's speech which blur the line between sanity and insanity. Fear, especially of the unknown and irrational fear, is a motif that seems to terrify Roderick. Incest is implied between Roderick and Madeline who live together in the family home without spouses. Friendship is shown through the narrator visiting his boyhood friend Roderick, though family