At the beginning of the book, Jane gets into trouble because of her behaviour towards John Reed. Described as it is, we realise immediately that she is the victim, and not a naughty child. When Jane refuses to live with Rochester as his mistress, it is easier to understand the moral code she lives by. When she struggles to resist St John Rivers, we can see her dealing with her desolation and sense of duty, at the same time as a certainty that marriage to him would not bring any happiness. Jane's strength is in her spirit, rather than physical power. At the beginning of the book, she may be defeated, and so overcome that she actually loses consciousness, but she still speaks confidently afterwards to Mr Lloyd, and looks forward to escaping from Gateshead by going to school.
Years later, when the bigamous marriage is halted, Jane is at first totally distraught. As she emerges from her initial grief, she realises she must leave Thornfield, even though this is opposed to her wishes. She describes her struggle to follow her conscience: "I wrestled with my own resolution: I wanted to be weak that I might avoid the awful passage of further suffering I saw laid out for me." (Chapter 27.) She will not allow herself to do anything other than follow her conscience. She also shows, in her admiration of characters like Helen Burns and Miss Temple, that she is a good judge of character.
There are a number of characters that Jane has to "overcome". There are simple bullies like John Reed, and people in a position of greater authority, such as Mr Brocklehurst and Mrs Reed. Jane is not always outspoken, yet she demonstrates to us, through her thoughts, that while she may be upset she is not