妙法蓮華經玄義 6.11

6.11

理善明生，理闇必滅，終不理惡滅，方始理善生，故於理善稱第一義悉檀也。若事善生，事惡未必去；事惡去，事善未必生。事是隔別，對治悉檀正是藥病相對，故不於中開第一義悉檀，其意在此。

When noumenal goodness clearly arises, noumenal darkness is bound to be eliminated; it never happens that noumenal evil is eliminated and only then does noumenal goodness begin to arise. Therefore, noumenal goodness is called the paramārtha siddhānta. If phenomenal goodness arises, phenomenal evil is not necessarily removed; if phenomenal evil is removed, phenomenal goodness does not necessarily arise. Phenomena involve separation and distinction, and the diagnostic siddhānta is precisely the mutual opposition of medicine and illness; therefore, the paramārtha siddhānta is not opened within it. The meaning lies right here.