At once ironic, humorous, and polemical, this work takes on the "unscientific" form of a mimical-pathetical-dialectical compilation of ideas. Whereas the movement in the earlier pseudonymous writings is away from the aesthetic, the movement in Postscript is away from speculative thought. Kierkegaard intended Postscript to be his concluding work as an author. The subsequent "second authorship" after The Corsair Affair made Postscript the turning point in the entire authorship. Part One of the text volume examines the truth of Christianity as an objective issue, Part Two the subjective issue of what is involved for the individual in becoming a Christian, and the volume ends with an addendum in which Kierkegaard acknowledges and explains his relation to the pseudonymous authors and their writings. The second volume contains the scholarly apparatus, including a key to references and selected entries from Kierkegaard's journals and papers.

    In Kierkegaard's view, faith is the most essential task of life. Faith is not a matter of dogmatic adherence, but rather of subjective passion. In "Purity of Heart", Kierkegaard discusses different aspects of living, particularly the responsibility of single-minded spiritual seeking and ethical integrity, offering clues to the nature of the good while insisting that each reader must work this out for themselves.