साध्याश्चैवाप्यसाध्याश्च व्याधयो द्विविधाः स्मृताः| मृदुदारुणभेदेन ते भवन्ति चतुर्विधाः ||४१||
curable and incurable, and depending upon their severity and responsiveness to drugs, are further categorized into two sub-categories within each of these types.
त एवापरिसङ्ख्येया भिद्यमाना भवन्ति हि| रुजावर्णसमुत्थानस्थानसंस्थाननामभिः ||४२||
[Criteria for classification of diseases] There are several diseases classified on the basis of type of pain, appearance (color), etiology, site, symptoms and name.
व्यवस्थाकरणं तेषां यथास्थूलेषु सङ्ग्रहः| तथा प्रकृतिसामान्यं विकारेषूपदिश्यते ||४३||
Their systematic classification has been attempted in the form of some gross disease families or classes. However, in other cases general principle may be followed.