成唯識論掌中樞要 2.180

2.180

行相有二：一、影像相名「行相」，何故即似本境？二、見分名「行相」，何故不似耶？答：影像名「行相」，見分之行解相狀，見分之行但境相貌。見分名「行相」，行於境體中故。如無分別智無狀相，故似不似。又未必影像相一向似境，無為緣等即不似故。

Cognitive form has two [senses]: First, the reflected image form is named "cognitive form"; why then does it resemble the original object? Second, the seeing part is named "cognitive form"; why does it not resemble it? Answer: The reflected image is named "cognitive form"; it is the aspect and character of the active understanding of the seeing part, and the activity of the seeing part is simply the feature of the object. The seeing part is named "cognitive form" because it acts within the substance of the object. Just as non-conceptual wisdom has no aspect or character, so it may or may not resemble [the object]. Furthermore, it is not necessarily the case that the reflected image form uniformly resembles the object, for when unconditioned phenomena are the intentional object, it does not resemble them.