肇論新疏 1.52

1.52

亦初二句明得名，由化眾生故名方便。後二句化而不染，復由大智導悲令塵不染，異凡夫也。《淨名》云：「無慧方便縛，有慧方便解。」以無慧方便，投愛見網、沒有相林故。塵謂五欲塵境，累謂生死過患。

The first two lines also explain how the name is acquired: because it transforms sentient beings, it is named expedient means. The latter two lines state that it transforms yet is not defiled; this again is because great wisdom guides compassion so that it is not defiled by dust, distinguishing it from ordinary persons. The Vimalakīrtinirdeśa says: "Expedient means without wisdom is bondage; expedient means with wisdom is liberation." This is because expedient means without wisdom falls into the net of craving and views and is submerged in the forest of marks. "Dust" refers to the dusty objects of the five desires; "encumbrances" refers to the faults and afflictions of birth-and-death.