The second part shifts the discussion from a psychological and existential analysis of despair to a theological and ethical context. Here, Kierkegaard connects despair with the concept of sin, arguing that despair at its root is sin. Sin, for Kierkegaard, is not just a moral failing or a transgression of law but is deeply tied to the relationship of the self with God. It’s the state of not having faith, of a refusal to align one’s self with God’s will, leading to a self-imposed separation from God. Despair becomes sin when it is a conscious or unconscious state of resistance against God, and the only cure for this sickness unto death is through faith, by establishing a proper relationship with God.
Through these two parts, Kierkegaard offers a penetrating insight into the nature of human existence, the self, and the existential despair that stems from an improperly oriented relationship with oneself and God.