you Sonia tells him to confess because only the truth can bring peace She promises to follow him to Siberia This promise gives him courage Her faith makes him feel that confession will not destroy him completely Porfiry s wise pressure Porfiry Petrovich the investigator also guides Raskolnikov to confession He suspects him but does not arrest him directly Instead he says that confession will bring relief Porfiry s clever words strike his heart In the end Raskolnikov surrenders before the police and admits Well of course in killing the old woman I did wrong The confession frees him from the endless struggle inside his mind Thus Raskolnikov confesses because of guilt Sonia s love and Porfiry s pressure In St Petersburg he commits sin but in Siberia he begins his new life His confession is the first step toward redemption and inner peace