唯識二十論述記 2.258

2.258

述曰：隨其所應顯義不定。由增上緣，若近善友聽聞正法，自相續中正識決定；若近惡友聽聞邪法，自相續中邪識決定。或近善、惡友，及由展轉為增上緣，能說法者，正邪悲愛；能聽法者，正邪智慧，二識決定，言「隨所應二識決定」，此由未顯。

Commentary: 'As appropriate' indicates that the meaning is not fixed. Through the adhipati-pratyaya, if one associates with a good friend and hears the true Dharma, right consciousness becomes determined in one's own continuity; if one associates with a bad friend and hears false teachings, wrong consciousness becomes determined in one's own continuity. Alternatively, when associating with good or bad friends and through mutually serving as adhipati-pratyayas, the one who expounds the Dharma has [the determination of] right or wrong compassion and affection, and the one who listens to the Dharma has [the determination of] right or wrong wisdom: the two consciousnesses become determined. The words 'the two consciousnesses become determined as appropriate' indicate this since it has not yet been specified.