成唯識論述記 9.43

9.43

The Commentary states: Below there are ten proofs, marked by the word 'because' occurring ten times. If the mind capable of imagining extended to all eight consciousnesses, why does the fourth fascicle of the Mahāyānasaṃgraha mention only the mind? Question: As the seventh consciousness is also capable of pervasive imagination, yet that treatise mentions only the mental consciousness and does not mention the seventh, could it be that the seventh cannot? Since the seventh consciousness is capable yet not mentioned, it clarifies that the five and eighth consciousnesses are also capable yet not mentioned.