Aphorism 72 | Organon of Medicine By Dr. Samuel Hahnemann
With respect to the first point, the following will serve as a general preliminary view. The disease to which man is liable are either rapid morbid processes of the abnormally deranged vital force, which have a tendency to finish their course more or less quickly, but always in a moderate time – these are termed acute diseases; – or they are diseases of such a character that, with small, often imperceptible beginnings, dynamically derange the living organism, each in its own peculiar manner, and cause it gradually to deviate from the healthy condition, in such a way that the automatic life energy, called vital force, whose office is to preserve the health, only opposes to them at the commencement and during their progress imperfect, unsuitable, useless resistance, but is unable of itself to extinguish them, but must helplessly suffer (them to spread and) itself to be ever more and more abnormally deranged, until at length the organism is destroyed; these are termed chronic diseases. They are caused by infection with a chronic miasm.
-Dr. Samuel Hahnemann