Jane Eyre Read-Along: Chapter 23

What I want to know is, how does Charlotte Bronte keep lines like "Oh, Jane, you torture me!" (p. 298) and "Make my happiness -- I will make yours" (p. 299) from sounding like sentimental, hackneyed claptrap?  Why do I thrill over this chapter (it miiiiiiiiight be my favorite) and find it not merely believable, but wholly delicious?  It amazes me, I tell you.  It's her first published novel, but it is almost startlingly good.  In my humble opinion, anyway.

So anyway, my mar...