Currer Bell is addressing the large amount of critics who denounced Jane Eyre and questioned the sex of the author writing such a rebellious book. Currer Bell is well aware of the bigotry surrounding the novel and is not afraid to make a point very clear: look beyond the author, beyond the base plot line, and instead look into the lives of the characters depicted in the novel. In the line, "I would suggest to such doubters certain obvious distinctions; I would remind them of certain simple truths." Currer Bell is saying not to ponder who scripted the pages of the book, but rather to enjoy the simple truths behind the story, the truths that people are aware of but rarely pay any attention too. These truths are those of love, choosing between good and bad, things that people are always forced to face, but, at least in those times, did not want to see in a novel. 

Writing this preface about the theme of self-righteousness in Jane Eyre protected Charlotte Bronte against critic's harsh words because she put herself out there. She openly recognized that Jane Eyre is a book meant to shock people, meant to make them think. She also addresses the bigotry that revolves around the novel and states that she is well aware of it. This shields her from critics because she knows what they are going to say before they say it, preparing herself for whatever cruel words may come. Being aware of her novel and the public outcry it created makes her a stronger person because she is not hiding anything from herself and is not asking the public to hide their opinions either.