Jacob Reisberg writes,
Raskolnikov’s suffering after his crime is just what one might expect in Nietzsche’s view. He is plagued with panic attacks and fever after murdering the old woman. He mistakenly believes he has the power to affect societal morality, like the master imposing his personal valuation of “what is right.” Because of this mistake, he acts, when, in Nietzsche’s view, a slave should choose inaction, and he pays the price for his action: the punishment of guilt.
Raskolnikov time and time again is either suffering from a fever, passed out in bed and being taken care of or sleeping for days on end and having nightmares. All this clearly shows his strange way of coping with what he did, and Sonia now realizes it in part 5 chapter 4 that he is so far gone that he hurt these two women. Raskolnikov is coming to his senses and realizing that he is no Napoleon; he can’t and will not get away with the crimes. Sonia knows that Raskolnikov will eventually die from internalizing all his guilt, so instead she tells him to turn himself in and “Suffer and expiate your sin by it, that’s what you must do.” (chapter 4 pt 5) she wants him to go to prison and repent for his sins. Most of all she wants him to be