Jane Eyre help me with homework: Scenes of madness and insanity are among the most important

Scenes of madness and insanity are among the most important plot devices in Jane Eyre. From the vision Jane sees when locked in the bedroom at Gateshead to her hearing the “goblin laughter” she attributes to Grace Poole, to the insanity and wretchedness of Bertha Mason, madness is of central importance to the plot and direction of the story. Give examples of madness in the text, and show how they affect the reader’s understanding of the character experiencing the madness and how these examples affect the reader’s understanding of the characters witnessing it.