唯識二十論述記 2.343

2.343

述曰：此論主解，釋第三句頌。以他心為質而心變緣，名他心智，非能親取他心等故，名他心智。如緣自心諸所有智，亦不親取，但變而緣，與本質異，名不如實。此自心智說見分者，前後許自變相緣故，非自證分等，名為自心智，彼如實知，無異解故。

The Commentary states: This is the treatise master's resolution, explaining the third line of the verse. It is called knowledge of others' minds because the mind transforms and takes it as object with the other's mind as the archetype, not because it can directly grasp the other's mind and so forth. Just as all knowledges taking one's own mind as object also do not directly grasp it, but merely transform and take it as object, differing from the archetype, which is called 'not as it truly is'. This knowledge of one's own mind refers to the seeing division, because earlier and later are admitted to transform and take each other as object; it is not the self-authenticating division and so forth that is called knowledge of one's own mind, for that knows as it truly is, without any discordant understanding.