大乘起信論裂網疏 5.52

5.52

此明善根微少、煩惱深厚之人，雖遇勝緣，不能發大乘心也。善根自有三乘、一乘之不同，煩惱又有界內、界外之差別。一一善根對彼一一煩惱，各作四句料簡：或善根多煩惱薄、或善根多煩惱厚、或善根少煩惱薄、或善根少煩惱厚，萬別千差，不可一概，皆是不定聚攝。

This explains that persons whose roots of goodness are feeble and few, and whose afflictions are deep and thick, although encountering superior conditions, cannot generate the Mahāyāna mind. Roots of goodness inherently have the differences of the three vehicles and the One Vehicle, and afflictions also have the distinctions of within the realms and beyond the realms. Examining each root of goodness against each affliction through four alternatives: some have many roots of goodness and thin afflictions; some have many roots of goodness and thick afflictions; some have few roots of goodness and thin afflictions; and some have few roots of goodness and thick afflictions. The myriad differences and thousand distinctions cannot be generalized; all are subsumed under the indeterminate group.