俱舍論記 23.45

23.45

「決謂決斷至順決擇分」者，答。決謂決斷，擇謂簡擇。決斷、簡擇謂諸聖道，以慧為體性，以諸聖道能斷疑故名決，及能分別四諦相故名擇。分謂分段。此言意顯所順唯是見道一分，非修、無學決擇。聖道總有三種，所謂見、修、無學三分，見道唯是決擇之一分，故得決擇分名。此四善根能為勝緣，引決擇分順益彼故，得順彼名。順是其因，決擇分是果，從因及果為名，故此名為順決擇分。

Regarding 'Pene- means definitive severance... factors leading to penetration': this is the answer. 'Pene-' means definitive severance; '-tration' means selection. Definitive severance and selection refer to the noble paths, which have wisdom (prajñā) as their essential nature. Because the noble paths are able to sever doubt, they are called definitive severance; and because they can distinguish the characteristics of the four truths, they are called selection. 'Factor' means part. The intent of this statement is to clarify that what they accord with is solely a part—the path of seeing—and not the definitive severance of the path of cultivation or the path of no-more-learning. The noble path comprises three kinds in total, namely the three parts of seeing, cultivation, and no-more-learning; the path of seeing is solely one part of definitive severance, and thus it obtains the name 'factor of penetration' (nirvedhabhāga). These four roots of good can serve as superior conditions to induce the factors of penetration and accord with and benefit them; therefore they obtain the name 'according with that' (nirvedhabhāgīya). 'According with' is the cause, and 'factor of penetration' is the fruit; named after both cause and fruit, these are therefore called the factors leading to penetration.