The Sickness unto Death

The Sickness unto Death
Front cover of the Penguin Classics edition
AuthorSøren Kierkegaard
Original titleSygdommen til Døden
LanguageDanish
SeriesSecond authorship (Pseudonymous)
GenrePhilosophy
Publication date
1849
Publication placeDenmark
Pages265
ISBN978-0-691-02028-0
OCLC10672189
Preceded byThree Discourses at the Communion on Fridays 
Followed byPractice in Christianity 

The Sickness unto Death (Danish: Sygdommen til Døden) is a book written by Danish philosopher Søren Kierkegaard in 1849 under the pseudonym Anti-Climacus. A work of Christian existentialism, the book is about Kierkegaard's concept of despair, which he equates with the Christian concept of sin, which he terms "the sin of despair". Walter Lowrie wrote that he saw the themes in The Sickness unto Death as a repetition of those in Kierkegaard’s earlier work, Fear and Trembling, and as being even more closely related to those in The Concept of Anxiety. Kierkegaard used two pseudonyms for opposite purposes: "Johannes Climacus" suggests that he is not a Christian, whereas "Anti-Climacus" suggests he is "an extraordinary Christian".