瑜伽論記 5.297

5.297

西方有釋云：如小乘見道，但觀無常所顯真如是勝義自相，故是現量。若散心緣共相法不知自相，如遠見火之煙，此知有火，以不知彼火熱自性，亦不知彼是何等火草火糞火等。

An interpretation from the Western Regions says: in the Śrāvakayāna path of seeing, merely contemplating the tathatā revealed by impermanence is the ultimate specific characteristic, and therefore it is direct perception. If an unconcentrated mind takes common characteristics as object without knowing the specific characteristics, it is like seeing the smoke of a fire from afar; one knows thereby that there is fire, but because one does not know the hot intrinsic nature of that fire, nor does one know what kind of fire it is—a grass fire, a dung fire, or the like.