16     It is only the slighter and acute diseases that tend, when the natural period of their course has expired, to terminate quietly in resolution, as it is called, with or without the employment of not very aggressive allopathic remedies; the vital force, having regained its powers, then gradually substitutes the normal condition for the derangement of the health that has now ceased to exist. But in severe acute and in chronic diseases which constitute by far the greater portion of all human ailments, crude nature and the old school are equally powerless; in these, neither the vital force, with its self-aiding faculty, nor allopathy in imitation of it, can affect a lysis, but at the most a mere temporary truce, during which the enemy fortifies himself, in order, sooner or later, to recommence the attack with still greater violence.