Dreams and hallucinations, as well as questions of madness, sanity, and existence are huge parts of Crime and Punishment. The novel is deeply psychological and most of us can relate to at least something in the book. In this age of talk shows and self-help books, everybody's a pop psychologist. Crime and Punishment is chock full of characters waiting for you try out your skills on them.
The beauty of the Siberian countryside allows Raskolnikov to focus on the beauty of life, instead of the ugliness, thereby allowing him to "see" Sonia for the first time.