成唯識論述記 7.556

7.556

述曰：文當第七夢、覺相違難。外人問曰：若一切覺時之色，皆如夢中之境，不離於識者，此即牒定他宗。自下為難，初先舉喻；下方起難。如從夢覺知彼唯心，即舉喻也，現覺了時，所取之境，既如夢境，何故覺時，於自色境不知唯識？如夢覺時知彼唯心也？此同《攝論》第四中難。

The Commentary states: The text corresponds to the seventh objection, the contradiction between dream and waking. The opponent asks: "If all form at the time of waking is like the objects in a dream, not separated from consciousness"—this restates the other school's position. Below begins the objection: first an analogy is raised, and below the objection is posed. "Just as upon waking from a dream, one knows it is mind-only" is the raising of the analogy; when presently cognizing, since the apprehended object is like an object in a dream, why is it that at the time of waking, regarding one's own objective form, one does not know it is consciousness-only, just as upon waking from a dream one knows it is mind-only? This is identical to the objection in fascicle four of the Mahāyānasaṃgraha.