This passage is essential to the novels development as Bronte uses it as a turning point in the central protagonist, Jane Eyre's life and character development. In this extract Jane is forced to break the ties to those around her to achieve freedom, independence and most importantly happiness without infringing on her morals and values. Jane must leave Mr. Rochester so that she doesn't degrade herself as a human being.
The red room is symbolic of how society traps Jane by limiting her freedom and imprisoning her. Jane uses the red room, in this passage, as a means of drawing renewed strength from her past fights for independence so that she doesn't give in to the plans Mr. Rochester has made for her. Jane views this plans as immoral and cannot go along with them. It was going to take immense courage however to go against Mr. Rochesters will and Jane draws this courage from her experience in the red room as a child. As with Mrs. Reed, Jane is again forced to cast aside the bonds to those around her so that she can find happiness without infringing upon her morals.
Bronte uses the moon as a metaphor for change throughout the novel. The moon is an serves as a substitute mother for Jane by providing a light for her path and guidance for her life. The moon calls out to Jane instructing her to "flee temptation". Jane imagines the moon through as a form of anthropomorphism by giving her a "white human form" with a "glorious brow" and responding to it as a daughter, because the moon nurtures Jane and gazes upon her almost lovingly. The moon also parallels Jane circumstance as to get to her the moon must "sever" the vapours in her path to get to Jane, and Jane must sever her ties to Mr. Rochester to win freedom and independence for herself.
The seasons are responsible for establishing much of the context throughout the book. Bronte draws reference to the fact that it is "but July" in this passage and therefore in the middle of...