But the capacity to enjoy is impossible without the capacity to suffer; and the faculty of enjoyment is one with that of pain. Whosoever does not suffer does not enjoy, just as whosoever is insensible to cold is insensible to heat.
As I discussed in the example paper I posed to Diigo, Miguel de Unamuno was an existential philosopher unlike those in the same school of thought because he included God within his philosophy (as opposed to the traditional atheism of thinkers such as Nietzsche: "God is dead.") This aligns with the suffering Raskolnikov experiences in C&P and the redemption that accompanies Ras after he serves time in Siberia and "finds" God. This is autobiographical, as Dostoevsky himself served time in a Siberian prison and became religious after the experience. The existentially-wrought text that also includes God is perfect to read through Unamuno's lens.
Not by way of reason, but only by way of love and suffering, do we come to the living God, the human God.