摩訶止觀 8.12

8.12

復次，利鈍合各束為四分，同是界內，共二乘斷，名「通煩惱」也。若界外四分，二乘不斷，名「別煩惱」。若作相關，何得離通有別？通惑為枝，別惑為本；得真智斷枝，得中智斷本。若作不思議者，祇界內煩惱即是菩提，何得非是別惑？已如前說。

Furthermore, when the sharp and dull together are each bundled into four divisions, they are equally within the threefold realm and severed in common by the two vehicles; they are called 'shared defilements'. If they are the four divisions outside the realm, which the two vehicles do not sever, they are called 'distinctive defilements'. If they are related to each other, how could the distinctive exist apart from the shared? The shared delusions are the branches, and the distinctive delusions are the root; by attaining true wisdom, one severs the branches, and by attaining middle wisdom, one severs the root. If taken inconceivably, the defilements within the realm are themselves bodhi; how could they not be the distinctive delusions? This has already been explained above.