One of the most remarkable philosophical works of the nineteenth century, The Sickness Unto Death is also famed for the depth and acuity of its modern psychological insights. Writing under the pseudonym Anti-Climacus, Kierkegaard explores the concept of 'despair', alerting readers to the diversity of ways in which they may be described as living in this state of bleak abandonment - including some that may seem just the opposite - and offering a much-discussed formula for the eradication of despair. With its penetrating account of the self, this late work by Kierkegaard was hugely influential upon twentieth-century philosophers including Karl Jaspers, Jean-Paul Sartre and Albert Camus. The Sickness unto Death can be regarded as one of the key works of theistic existentialist thought - a brilliant and revelatory answer to one man's struggle to fill the spiritual void.

Anti-Climacus introduces the book with a reference to Gospel of John 11.4: "This sickness is not unto death." This quotation comes from the story of Lazarus, in which Jesus raises a man from the dead. However, Anti-Climacus raises the question: would not this statement still be true even if Jesus had not raised Lazarus from the dead? While the human conception of death is the end, the Christian conception of death is merely another stop along the way of the eternal life. In this way, for the Christian, death is nothing to fear. The true "Sickness unto Death," which does not describe physical but spiritual death, is something to fear according to Anti-Climacus. This sickness unto death is what Kierkegaard calls despair. According to Kierkegaard, an individual is "in despair" if he does not align himself with God or God's plan for the self. In this way he loses his self, which Kierkegaard defines as the "relation's relating itself to itself in the relation." Kierkegaard defines humanity as the tension between the "finite and infinite," and the "possible and the necessary," and is identifiable with the dialectical balancing act between these opposing features, the relation. While humans are inherently reflective and self-conscious beings, to become a true self one must not only be conscious of the self but also be conscious of being aligned with a higher purpose, viz God's plan for the Self. When one either denies this Self or the power that creates and sustains this Self, one is in despair. There are three kinds of despair presented in the book: being unconscious in despair of having a self, not wanting in despair to be oneself, and wanting in despair to be oneself. The first of these is described as "inauthentic despair," because this despair is born out of ignorance. In this state one is unaware that one has a self separate from its finite reality. One does not realize that there is a God, and accepts finitude because one is unaware of possibility of being more inherent in selfhood. The second type of despair is refusing to accept the self outside of immediacy; only defining the self by immediate, finite terms. This is the state in which one realizes that one has a self, but wishes to lose this painful awareness by arranging one's finite life so as to make the realization unnecessary. This stage is loosely comparable to Sartre's bad faith. The third type is awareness of the Self but refusal to submit to the will of God. In this stage, one accepts the eternal and may or may not acknowledge the creator, but refuses to accept an aspect of the Self that one in reality is, that is to say, the Self that one has been created to be. To not be in despair is to have reconciled the finite with the infinite, to exist in awareness of one's own self and of God. Specifically, Kierkegaard defines the opposite of despair as faith, which he describes by the following: "In relating itself to itself, and in willing to be itself, the self rests transparently in the power that established it."

Best known as a philosopher, one of the founders of existentialism, Kierkegaard also wrote books whose themes were primarily religious, psychological or literary. He was opposed to much in organised Christianity, stressing the necessity for individual choice against prescribed dogma and ritual. In this book, he concentrates his penetrating psychological observations on the theme of despair.

A companion piece to The Concept of Anxiety, this work continues Søren Kierkegaard's radical and comprehensive analysis of human nature in a spectrum of possibilities of existence. Present here is a remarkable combination of the insight of the poet and the contemplation of the philosopher. In The Sickness unto Death, Kierkegaard moves beyond anxiety on the mental-emotional level to the spiritual level, where--in contact with the eternal--anxiety becomes despair. Both anxiety and despair reflect the misrelation that arises in the self when the elements of the synthesis--the infinite and the finite--do not come into proper relation to each other. Despair is a deeper expression for anxiety and is a mark of the eternal, which is intended to penetrate temporal existence.

The Sickness unto Death (1849) is commonly regarded as one of Kierkegaard's most important works – but also as one of his most difficult texts to understand. It is a meditation on Christian existentialist themes including sin, despair, religious faith and its redemptive power, and the relation and difference between physical and spiritual death. This volume of new essays guides readers through the philosophical and theological significance of the work, while clarifying the complicated ideas that Kierkegaard develops. Some of the essays focus closely on particular themes, others attempt to elucidate the text as a whole, and yet others examine it in relation to other philosophical views. Bringing together these diverse approaches, the volume offers a comprehensive understanding of this pivotal work. It will be of interest to those studying Kierkegaard as well as existentialism, religious philosophy, and moral psychology.

Walter Lowrie's classic, bestselling translation of Søren Kierkegaard's most important and popular books remains unmatched for its readability and literary quality. Fear and Trembling and The Sickness Unto Death established Kierkegaard as the father of existentialism and have come to define his contribution to philosophy. Lowrie's translation, first published in 1941 and later revised, was the first in English, and it has introduced hundreds of thousands of readers to Kierkegaard's thought. Kierkegaard counted Fear and Trembling and The Sickness Unto Death among "the most perfect books I have written," and in them he introduces two terms--"the absurd" and "despair"--that have become key terms in modern thought. Fear and Trembling takes up the story of Abraham and Isaac to explore a faith that transcends the ethical, persists in the face of the absurd, and meets its reward in the return of all that the faithful one is willing to sacrifice, while The Sickness Unto Death examines the spiritual anxiety of despair. Walter Lowrie's magnificent translation of these seminal works continues to provide an ideal introduction to Kierkegaard. And, as Gordon Marino argues in a new introduction, these books are as relevant as ever in today's age of anxiety.