成唯識論述記 1.91

1.91

述曰：此第三計，即大乘中一類菩薩，依相似教說識體一。《攝論》第四說：一意識菩薩計：一、依遠行及獨行教，遊歷諸境，故說遠行。復言獨行，無第二故；二、依五根所行境界，意各能受教；三、依六識身皆名意處教；四、又《解深密》、《瑜伽》等說如依一鏡上有多影像教；五、如依一水中有多波喻教。此恐違至教，故說有一識。有云：一意識但說前六識為一意識，理必不然，此說八識體是一故。

The Commentary states: This third doctrine belongs to a class of bodhisattvas in the Mahāyāna who rely on semblance teachings and say that the essence of consciousness is one. The fourth fascicle of the Mahāyānasaṃgraha states: The bodhisattvas who advocate a single consciousness cling [to this]: First, relying on the teaching of 'faring far' and 'faring alone': wandering through various spheres, it is therefore said to 'fare far'; again, it says 'faring alone', because there is no second; second, relying on the teaching that the mind can apprehend each of the realms traversed by the five faculties; third, relying on the teaching that the six bodies of consciousness are all called the mind sense-field (manāyatana); fourth, also the teaching in the Saṃdhinirmocana, Yogācāra, and so on that says 'just as on a single mirror there are multiple images'; fifth, the analogy of 'just as on a single body of water there are multiple waves'. Fearing to contradict the ultimate teaching, they say there is only one consciousness. Some say that 'one mental consciousness' only refers to the first six consciousnesses being one mental consciousness; this is logically untenable, for this refers to the eight consciousnesses being one in essence.