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".
Johann Christian August Heinroth
Heinroth regarded sin as a cause of mental illness. His description of sin came from a 19th-century Protestant standpoint, and was also derived from an accepted European code of ethics and morality. His definition of sin wasn't based on a singular event, but rather as a period of several years of an individual striving towards earthly, bodily satisfaction. From a philosophical point of view, Heinroth espoused the teachings of Johann Gottfried Herder (1744–1803).