俱舍論記 18.181

18.181

「諸有為善至義准已成」者，釋第三句，明有為善異名。諸有為善亦名應習，此善在身數數現前，漸漸增進可修習故。又生果故。餘不善、無記及無為法，非應修習，義准已成。問：何故不善、無記非修習耶？答：《正理》云「不善、無記非應習者，以彼體非昇進法故。」

Regarding "Wholesome saṃskṛta phenomena [...] is already implicitly established": this explains the third line, elucidating alternative designations for wholesome saṃskṛta phenomena. Wholesome saṃskṛta phenomena are also called "to be cultivated" (āsevitavya). Because this wholesome [state] repeatedly becomes manifest in the person and progressively increases, it can be cultivated; furthermore, it produces fruits. That the remaining unwholesome, unrecorded, and asaṃskṛta phenomena are not to be cultivated is already implicitly established. Question: Why are unwholesome and unrecorded phenomena not to be cultivated? Answer: The Nyāyānusāra says: "That unwholesome and unrecorded phenomena are not to be cultivated is because their essential nature is not that of phenomena of progress."