大乘起信論義記 3.34

3.34

四、現色不相應者，是上五意中現識，是上三細中境界相，猶如明鏡現色像等，此依根本無明動令現境也。以八地中得三種世間自在，色性隨心無有障礙，故云色自在地能離也。以色不自在位現識不亡故，此位中遣彼相也。

Fourth, regarding the manifesting-matter-unconjoined [defilement]: this is the manifesting consciousness among the five consciousnesses above and the mark of objective realms among the three subtle [marks] above. Just like a bright mirror manifesting material images, it relies on fundamental avidyā stirring [the mind] so as to cause it to manifest objective realms. Because on the eighth ground one attains mastery over the three kinds of worlds and the nature of matter accords with the mind without obstruction, it is said that 'it can be separated from by relying on the ground of mastery over matter'. Because in stages without mastery over matter the manifesting consciousness does not perish, in this stage that mark is dispelled.