唯識二十論述記 2.200

2.200

述曰：下破憶持，先外人救。謂彼救言：要曾過去眼等五識，現受此境，今時意識方能憶持，非先未受，後意能憶。此則汎說先緣後憶，是故決定有曾受境，顯過去世現境非無，是曾五識現所受故。

Commentary: Below is the refutation of memory, beginning with the opponent's defense. The opponent's defense means: One must previously, in the past, have experienced this object directly through the five consciousnesses—eye and the rest—for the mental consciousness at the present time to be able to remember and retain it; it is not the case that without prior experience, the subsequent mental consciousness could remember it. This speaks generally of first apprehending and later remembering; therefore, an experienced object definitely exists, showing that the present object of the past is not non-existent, because it was previously experienced directly by the five consciousnesses.