"I _do_ love you," I said, "more than ever: but I must not show or indulge the feeling: and this is the last time I must express it."
Chapter 27 · Jane Eyre
Context
Jane admits she loves Rochester more than ever, but insists she must not show or indulge that love, and that this is the last time she will express it.
Analysis
Jane's use of italics on '_do_' transforms the verb into an emphatic assertion, as if she is countering an accusation that she does not love him. But immediately after affirming the feeling, she negates any action that might follow from it: 'I must not show or indulge.' The modal 'must not' is self-imposed law, and 'indulge' treats her love as a dangerous luxury. The finality of 'this is the last time' turns the declaration into a kind of goodbye even as it is spoken—she is performing the ending of their relationship within the confession of love.
Essay Tip
Use this to argue that Jane separates feeling from action in a way that Rochester cannot comprehend—her moral framework allows her to love him and refuse him simultaneously, which redefines what it means to have agency over one's own emotions.