大乘起信論義記 3.64

3.64

Furthermore, among the former three coarse ones, the latter two—namely the continuation-conjoined and the discriminating-knowledge-conjoined defilements—are somewhat subtle within the coarse mind, hence they are called 'the subtlest among the coarse'. Regarding 'the coarsest among the subtle': the latter three defiled minds are all called subtle; among them, the former two, namely the ability to perceive and the ability to manifest, are these. Being equally unconjoined, they are called subtle; compared with the subsequent fundamental karmic consciousness, they are again called coarse. These are the realms known in the stages of bodhisattvas on or below the ten grounds.