成唯識論演祕 4.617

4.617

按無著《攝論》云：「又五同法亦不得有，成過失故。所以者何？以五識身必有眼等俱有依故。」世親論解與此別說，《無性論》同。世親論云：言同法者，第六意識與五識有相似法故，彼有五根及阿賴耶為俱有依。此亦如是，有染污意、阿賴耶識為俱有依。此五同法，離染污意決定非有。

Examining Asaṅga's Mahāyānasaṃgraha, it says: "Furthermore, sharing the same property as the five [consciousnesses] also could not exist, which would constitute an error. Why? Because the group of five consciousnesses must have the eye and so on as their co-existent support." Vasubandhu's commentary on the treatise explains this differently, whereas Asabhāva's commentary is the same [as this text]. Vasubandhu's commentary says: 'Sharing the same property' means that the sixth, mental consciousness, has a similar property to the five consciousnesses, because they have the five sense faculties and the ālaya as co-existent supports. This is also like that: it has the defiled manas and the ālaya-vijñāna as co-existent supports. This sharing of the same property as the five definitely cannot exist apart from the defiled manas.