妙法蓮華經玄義 1.133

1.133

悉檀是佛智慧，對利鈍緣則成四種。利人聞世界解第一義，此對釋名辨體即足。若鈍人未悟，更須為人生善、對治破惡，乃入第一義，則具用四也。五重玄義，意兼利鈍。四悉檀法，專為鈍者，對義是同，次第則異。

The siddhāntas are the Buddha's wisdom; matched against sharp and dull capacities, they become four kinds. Sharp people, upon hearing the worldly [siddhānta], understand the supreme truth; for them, matching against explaining the title and discerning the substance is quite sufficient. If dull people have not yet awakened, it is further necessary to produce good for people and apply therapeutics to shatter evil, and only then do they enter the supreme truth; thus all four are fully used. The intention of the fivefold profound meaning embraces both the sharp and the dull. The method of the four siddhāntas is specifically for the dull. Their matched meanings are identical, but their sequences differ.