妙法蓮華經玄義 3.113

3.113

若開麁顯妙者，諸方便諦既融成妙諦，對諦立智，悉非復麁。如賤人舍，王若過者，舍則莊嚴；如眾流入海，同一鹹味。開諸麁智，即是妙智也。

If one opens the crude and reveals the wondrous, since the various truths of expedient means blend and fuse into the wondrous truth, when establishing wisdom in contrast to truth, none are crude anymore. Just as when a king visits the house of an outcast, the house becomes adorned; or just as when the many streams flow into the ocean, they share the same salty flavor. Opening the various crude wisdoms, they are precisely wondrous wisdom.