The Concept of Anxiety
The Concept of Anxiety (): "A Simple Psychologically Orienting Deliberation on the Dogmatic Issue of Hereditary Sin", is a philosophical work written by Danish philosopher Søren Kierkegaard in 1844. The original 1944 English translation by Walter Lowrie (now out of print), had the title The Concept of Dread. "The Concept of Anxiety" was dedicated "to the late professor Poul Martin Møller". He used the pseudonym Vigilius Haufniensis (which, according to Kierkegaard scholar Josiah Thompson, is the Latin transcription for "the Watchman" of Copenhagen) for "The Concept of Anxiety".
Knight of faith
If I am anxious about a past misfortune, then this is not because it is in the past but because it may be repeated, i.e., become future. If I am anxious because of a past offense, it is because I have not placed it in an essential relation to myself as past and have in some deceitful way prevented it from being past. If indeed it is actually past, then I cannot be anxious but only repentant. If I do not repent, I have allowed myself to make my relation to the offense dialectical, and by this the offense itself has become a possibility, and not something past. If I am anxious about the punishment, it is only because this has been placed in a dialectical relation to the offense (otherwise I suffer my punishment), and then I am anxious for the possible for the future. Thus we have returned to where we were in Chapter I. Anxiety is the psychological state that precedes sin. It approaches sin as closely as possible, as anxiously as possible, but without explaining sin, which breaks forth only in the qualitative leap. Søren Kierkegaard, "The Concept of Anxiety", Nichol p. 91-92