I need to make a thesis statement for Wuthering Heights by Emily Bronte, but I don't know that the one I have is really even considered a thesis statement.
"Wuthering Heights tends to leave readers with conflicting emotions as to how they feel about the book because the story is so beautifully written -- a page-turner -- yet it reveals the ugliness of human nature."
Is there any way for me to turn this into a good, strong thesis? Or is it not a thesis at all?
I think you have a good start on a thesis statement, but what you have there is really a topic. Think about how you are going to prove this, and what characters will be your focus. If I am correct, what you are trying to prove in your essay is that Wuthering Heights juxtaposes the attraction of a typical love triangle plot with glimpses of the evil side of human nature. Talk to your teacher and make sure it covers what he/she is requiring, but the bolded suggestion would work in my class.
Next, you have to think about how exactly what you will prove this. My suggestion is to first cover the basic draw people have to the love story - an age-old tale of a lovely lady having to choose between two lovers, in this case Heathcliff and Edward. But, when the reader goes deeper into the novel and the psyches of its characters, he realizes it's really not like any other love story at all. Catherine and Heathcliff have a very toxic but magnetic relationship; Catherine is perhaps just using Edward to move up in society. It's even debatable if Catherine and Heathcliff can physically live without one another. As you stated, there are some glimpses of the negative human spirit in the novel in how these two react to one another and the other characters in the text. Good luck!