維摩經略疏垂裕記 7.194

7.194

二、約八魔。「三藏至伏四魔」者，即邪常樂我淨也。「圓破八魔」者，二邊即中魔。即佛界不破而破，名為圓破。所以八皆稱魔者，魔名殺者，常等殺真諦善，無常等殺中道善。故初住已上雖分證真常，無明未盡變易仍在，是故無常等四極至後心。

Second, according to the eight māras. Regarding "the Tripiṭaka up to subduing the four māras": these are the deviant permanence, bliss, self, and purity. Regarding "the perfect [teaching] refuting the eight māras": the two extremes are the demons of the middle. They are refuted without being refuted within the Buddha-realm; this is called perfect refutation. As for why all eight are called māras: *māra* means killer; permanence and the others kill the good of the true truth, while impermanence and the others kill the good of the middle way. Therefore, although those from the first abode upward have partially verified true permanence, their ignorance is not yet exhausted and transformational [birth and death] still remains; hence the four, such as impermanence, reach their extreme at the final mind.