大乘起信論義記 2.240

2.240

合中言無漏者，始本二覺也。無明者，本末不覺也。此二皆有業用顯現而非實有，故云業幻，此等合種種器也。皆同真如性相者，以動真如門作此生滅門中染淨二法，更無別體，故云性也。真如亦以此二法為相，淨相可知。其染相者，下文云「但以無明而熏習故即有染相。」

In the application, "the untainted" refers to the two kinds of enlightenment, incipient and innate. "Avidyā" refers to fundamental and derivative non-enlightenment. Both of these have karmic functioning and manifestation without being truly real; hence they are called "karmic illusions." These correspond to the various vessels. "All share the nature and marks of tathatā" means: because the gate of tathatā is stirred to become these two dharmas of defilement and purity in the gate of arising and ceasing, with no separate substance, it says "nature." Tathatā also takes these two dharmas as its marks; its pure mark can be understood. As for its defiled mark, the text below says: "It is only because of the perfuming of avidyā that there are defiled marks."