俱舍論疏 25.96

25.96

On the Śāstra's "Why is this? … it relies only on six grounds": this explains the reason. For the non-trainee, honing the faculties is like attaining the fruit of arhatship, and therefore it extends to nine grounds. For the trainee, honing the faculties means abandoning the dull fruit and the approach; one attains only the sharp fruit. The trainee's prior fruit [stream-enterer] relies only on the threshold concentration. The third [fruit, the non-returner,] extends to six grounds and does not rely on the formless realm, just as with the path of seeing. For this reason, when one in the trainee stage trains their faculties: if they abide in the fruit-path, the three [paths] of preliminary application and so forth are all subsumed under the fruit-path. If they abide in the superior-fruit path, preliminary application and the uninterrupted [path] are subsumed under the superior-fruit path; the liberation [path] is subsumed under the fruit of the path. When one abiding in the non-trainee stage trains their faculties, the three [paths] of preliminary application and so forth are subsumed only under the fruit-path. Whenever those abiding in the fruit stage hone their faculties, they abandon a fruit and attain a fruit. When those abiding in the superior-fruit stage hone their faculties, they abandon both and attain a fruit. Furthermore, when all noble stages hone their faculties, the ground may be identical with or different from the ground where the fruit was originally attained: the grounds relied upon for the first and second fruits are necessarily identical; for the non-returner and the fruit of arhatship, the grounds relied upon are indefinite—either relying on their original ground, or above or below. Where there is a difference: if non-returners hone their faculties relying on a lower [ground], they do not attain a higher fruit. Not so for the arhat, because it is like their original attainment of the fruit. According to this treatise text, one who enters the path of seeing relying on a root ground also trains their faculties, because non-returners attain the fruit relying on a higher ground and train their faculties relying on a lower ground. The arbitrator in fascicle sixty-seven of the Vibhāṣā says: "It should be said thus: if one has already attained mastery over a higher ground and trains to transform the faculties relying on a lower ground, they also attain the higher ground's anāsrava fruit-path. However, when transforming faculties, one does not attain the formless [realm], because there is definitely no fruit of the non-returner there." The Nyāyānusāra is based on those who lack mastery over the higher ground, whereas the Vibhāṣā's statement on attaining the higher fruit is based on having mastery; there is no contradiction.