"I saw a robed and veiled figure, so unlike my usual self that it seemed almost the image of a stranger"(304). Although it's Jane's wedding day she isn't excited, seems almost unhappy with her dress, and is waiting with bated breath to see if her dreams come true.
"It simply consists in the existence of a previous marriage. Mr.Rochester has a wife now living"(307). This is important because its the reason why Mr. Rochester and Jane cannot be married. It's why Jane loses faith in Edward, because she had not known that Mr. Rochester had previously been married or that his old wife was still alive.
"the lunatic sprang and grappled his throat viciously, and laid her teeth to his cheek: they struggled...he would not strike"(311). This scene is important because it is how Jane is introduced to Bertha and how Mr. Rochester tries to justify marrying Jane though his wife is alive. It also answers important questions: what is the laughing sound, why was Mason stabbed, and etc.
"faith was blighted-confidence destroyed! Mr. Rochester was not to me what he had been; for he was not what I had though him"(314). This scene was important because it is a turning point for Jane and her relationship with Mr. Rochester.It tells the reader how the events of the chapter have made Jane lapse back into her old self; the Jane before Thornfield.