俱舍論疏 5.12

5.12

論「世雖不了至亦何所用」，第三難也。《正理》釋云「同分非色，如何得知有用，能生無別事類？由見彼果，知有彼故。如見現在業所得果，知有前生曾所作業。又觀行者現證知故。」

[On the] Śāstra['s statement]: "Although the world does not understand … of what use would it be?": This is the third objection. The *Nyāyānusāra* explains: 'Generic similarity is not material form; how is it known to have function and to be able to produce distinct kinds of entities? It is known that it exists because its fruit is seen. Just as seeing the fruit obtained by karma in the present allows one to know that there was karma previously performed in a past life. Moreover, practitioners of contemplation directly realize and know it.'