Two dramatic scenes in Crime and Punishment

Moving into part 4 of Fyodor Dostoyevsky's Crime and Punishment (1866), the protagonist, Raskolnikov, has two extremely dramatic scenes that show is erratic behavior, his disturbed mind, but also his passion for the well-being of others - a seemingly complete contradiction in his personality: how could someone so sensitive and passionate have murdered two women? We see R at his best in the long family drama, at which his sister's fiance, Luzhin, pleads his case - and R stands up to him and tells him to get lost and to never approach his sister again. This reaction is all well and good, as L is clearly a loathsome and self-centered character, but, as sister Dunya notes, she can feel free to push L out of her life now that she's learned she's inherited 3,000 roubles, apparently enough to establish her in an independent life. Would she have taken L's side had she needed the money? Probably - that seems to be one of the themes of this novel, how poverty and desperation can drive good people to ruinous acts. (To her credit, D refuses the offer of a payoff from her former employer who (in today's terms) harrassed her sexually.) After settling his families problems, R, in a moment typical of his behavior, tells them he has to be alone and to not bother him and he storms off - headed for the dwelling of Sonya, the 18-year-old whose father died in the street run over by carriage horses (and R paid for the funeral - which he could definitely not afford). Now he nearly confesses his crime to S, but also seems to throw himself at her feet in worship, completely confusing and troubling her, and he says he will come back the next day w/ important information. Will he confess his crimes to her? To what end? How will this help her? Nothing in his behavior is rational, but we see that his instincts are at this time anyway for the best - even though impractical and extreme: He has rescue fantasies, perhaps as a form of atonement for his crimes - but he will learn, I think, that charity toward others does not eradicate what he'd done.