Conflict in Crime and Punishment
Dostoevsky chose these names for particular reasons. In Russian, raskol (раскол) means "split" and the main characters family name roughly translates to "of the splitters." Considering what we learn about his state of mind and ideas regarding crime and justice, the choice of this name more than adequately represents the conflicts, both internal and external, that he will face.
The man contrasts his fright at having to listen to his landlady with something else he is thinking of attempting. While we don't know what this other thing is yet, we do know that he considers it something of importance. He continues to mutter to himself in an effort to make sense of his thoughts and actions, and we see how this inner conflict develops over time.
In several moments like this one, Raskolnikov's reason and willpower return to him and allow him to take the necessary steps to cover up his crime. However, the internal struggles he is having prohibit him from covering all of his tracks, and he does forget a few important pieces of evidence.
This convulsive shudder provides evidence for the internal struggle Raskolnikov is having during the aftermath of killing Alyona Ivanovna. He is torn between accomplishing what he set out to do and fleeing the scene of his crime.
Recall how in Chapter 2 he had a little food and drink and instantly felt better. While the mental turmoil Raskolnikov is suffering from at this moment is no doubt real, another consideration for this could be that he has hardly eaten any food in the last 48 hours. The heat of the day and the weakness of his body are likely contributing factors to his well-being.
While he decides that his reasons for not looking in the purse for money are due to his sickness, Dostoevsky is using Raskolnikov's inner monologues to show readers how unstable he is. Raskolnikov's ego makes him believe he is capable of dealing with the consequences of this crime; however, he is steadily realizing that his reason is not as sound as he believed. He blames this on illness, but notice how this attitude shifts during the progression of the novel.
Nobody in the story has provided any credible reason for doing such a thing to Raskolnikov. This statement more likely indicates the growing paranoia he feels from the crime and emphasizes the internal conflict he is having with his ego and psyche.
Raskolnikov's reaction to this woman's attempted suicide reveals that he himself was considering this action while standing on the bridge considering how he could end the struggle and guilt he is feeling. Seeing her attempt, he realizes that to die in such a way is not appropriate for him and contemplates that living the rest of his life in a jail cell would be preferable to suicide.
Raskolnikov sees the condition this woman is in and reflects on how he heard once that life, no matter what condition, is preferable to death. This chapter reveals how he continues to suffer psychologically from the guilt of his conscience as he contemplates how it can end it "one way or another." This manifests as a struggle between confessing, which would be like death to him, and a desire to live.
Throughout the novel, Dostoevsky has written in such a way to suggest to the readers that Raskolnikov suffers from a personality disorder. It appears that this knowledge is also suspected by Razumihin, which strongly reinforces the suggestion. If Raskolnikov is suffering from a personality disorder, then this explains much about his mood swings and how he struggles with his guilt.
Svidrigailov makes a rather astute observation of Raskolnikov's behavior. The "Schiller" part of Raskolnikov represents the morally upright, idealistic individual. By pointing out that this part is in revolt, Svidrigailov identifies the suffering and Raskolnikov is experiencing from his crime. Since much of Raskolnikov's experiences have been related to readers via his own observation, this provides extra evidence of the internal conflict the main character has been facing.