摩訶止觀 3.161

3.161

若析、體二乘及通菩薩等，先斷界內惑盡，而未曾修習假、中者，生於界外，界外惑全未被伏，其根則鈍。若於彼習觀時，必須次第歷劫修行，學恒沙佛法，先破塵沙。塵沙雖不潤生，能障化道，故須前斷。斷此惑者，止是調心方便，伏界外惑；進斷三道，相應、獨頭，枝本皆去。故知假觀正攝得塵沙，亦攝得無明。

If practitioners of the two vehicles through analysis or embodiment, bodhisattvas of the shared teaching, and the like, have first completely severed the delusions within the realm but have never practiced the provisional and the middle, when they are born beyond the realm, the delusions beyond the realm have not been subdued at all, and their faculties are dull. When they practice contemplation there, they must cultivate through kalpas in sequence, learning buddhadharmas numerous as the sands of the Ganges, first destroying [delusions numerous as] dust and sand. Although dust and sand do not moisten rebirth, they can obstruct the path of conversion; therefore they must be severed first. Severing this delusion is merely an expedient for tuning the mind, subduing the delusions beyond the realm; advancing to sever the three paths, both associated and solitary, branches and root are all eliminated. Hence we know that the contemplation of the provisional directly subsumes dust and sand, and also subsumes avidyā.