The world lay spread before me (Vol.I, chapter xix). How does Dickens use narrative to explore the idea of  great expectations in his novel?

Im looking for a 2000 word model essay on this topic, as if written for the literature module of a B. A. degree-level English course.

Please keep the essay firmly on topic. I am looking for good usage of quotations, strong opening and closing paragraphs and generally clear, concise and focused arguments. Please backup any assertions that you make with evidence to support it.

Regarding sources: I would prefer only reputable and (preferably) peer reviewed sources to be used. In other words, not from unreliable sources such as wikipedia.