1 Having dealt with all that pertains to whole classes of diseases taken together, I come to the treatment of diseases one by one. Now the Greeks divided these into two species, terming some acute, others chronic. But because maladies did not always respond in the same way to treatment, some of the Greek writers have placed among the acute what others have placed among the chronic; from this it is clear that there are more than two classes. For some diseases are certainly of short duration, which carry off the patient quickly, or themselves come quickly to an end; some are chronic, in which neither recovery is near at hand nor death; and there is a third class, at one time acute, at another time chronic, and that occurs not only in fevers, where it is most frequent, but in other affections also. And besides the above there is a fourth class which cannot be said to be acute, because it is not fatal, nor really chronic, because if treated it is readily cured. When I come myself to speak of diseases singly, I will point out to which class each belongs. But I shall divide all diseases into those which appear to have their seat in the body as a whole, and into those which originate in particular parts. I shall begin with the former, after a few words of preface concerning all.
Whatever the malady luck no less than the art can claim influence for itself; seeing that with nature