瑜伽論記 13.51

13.51

述曰：說彼第八雖生法執，若除法執要由唯識，第八既是諸法如實因緣，此乃唯識之本，故為大根得說本識云云。其此識義者，佛說法要以利物為本；若說此法始即不墮生死，終即能得涅槃者，佛即為說然此識凡夫聞之生分別二我；若二乘聞生法執故，及不能作唯識觀故，始則有損，終則無益。

The commentary says: Although teaching that eighth [consciousness] may give rise to grasping of phenomena, the elimination of grasping of phenomena must depend on consciousness-only. Since the eighth is the real causal condition of all phenomena, this is the very basis of consciousness-only; therefore, for those of great faculties, the fundamental consciousness may be taught. As for the meaning of this consciousness: the Buddha's preaching of the Dharma takes benefiting sentient beings as its foundation; if teaching this Dharma ensures that initially one does not fall into saṃsāra and ultimately one is able to attain nirvāṇa, then the Buddha teaches it. However, if ordinary beings hear of this consciousness, they give rise to conceptual construction of the two selves; and if the two vehicles hear of it, they give rise to grasping of phenomena and cannot perform the contemplation of consciousness-only; thus initially there is harm, and ultimately there is no benefit.