成唯識論演祕 3.820

3.820

答：假實能所形待名互，亦如世言父子相生。又類既一後識熏時，亦得名為熏前念也，如前熏後識，義意同也。或可彼許類、識相熏，同此論說。不爾，云何名為互耶？既許前後多識雖異，而類是同，故前熏後，前凡後聖，類同識異，何不同彼前熏後耶？

Answer: The reciprocal relation between the nominal and the real, as perfumer and perfumed, is called 'mutual'—just as in conventional speech father and son are said to produce each other. Furthermore, since the class is one, when a posterior consciousness perfumes, it can also be called perfuming the prior moment, just as the prior perfumes the posterior consciousness; the conceptual import is identical. Alternatively, perhaps they accept that the class and consciousness perfume each other, which accords with the statement in this Treatise. If not, how could it be termed 'mutual'? Since they accept that although multiple prior and posterior consciousnesses differ, their class is identical, so that the prior perfumes the posterior—the prior being ordinary and the posterior being noble, identical in class but differing in consciousness—why should it not be the same as their prior perfuming the posterior?