成唯識論述記 5.871

5.871

述曰：二十隨惑，根本等流。等流者，同類所引義，非前後等流也。於善染心皆不定者，即不定四，謂於善、染、無記三性，心皆不定故。復說等言，下第七不定中云，於善、染等皆不定故。彼復有言：非遍心起，非遍地有。總此三門，初門簡唯善、染心所；第二門簡遍行；第三簡別境。此中言等，等取餘二門也。

The Commentary states: The twenty secondary defilements are the outflows (niṣyanda) of the fundamental [defilements]. 'Outflow' means produced by the same class, not sequential outflow. 'Because they are not determinate with respect to wholesome and defiled minds' refers to the four indeterminate factors: that is, because with respect to the three natures—wholesome, defiled, and neutral—mind is always indeterminate. It further says 'and so forth'; below, in the discussion of the seventh, the indeterminates, it states: 'because they are indeterminate with respect to the wholesome, defiled, and so forth.' There it also says: 'they do not arise in all minds, nor do they exist in all stages.' In sum, these three gates: the first gate excludes mental factors that are purely wholesome or defiled; the second gate excludes omnipresent factors; the third excludes object-contingent factors. Here, the word 'and so forth' includes the other two gates.