俱舍論疏 23.54

23.54

論「後增進位至未來十六」，明煖增進位行、得修也。三諦皆有色、受、心、法故。非初易位，容現別觀色、受、心等，故云隨一念住現在修也。雖能傍修餘諦念處，數不過四，故言四也。「隨一行現在修未來十六」者，以傍修餘諦也。緣滅諦無餘念住故，法念住現在修。傍修餘諦故，未來四也。行修初後皆同法念。

The Śāstra says: "In the subsequent stage of advancement... sixteen in the future." This explains cultivation through practice and acquisition in the advancing stage of warmth. Because the three truths all contain form, feeling, mind, and dharmas, and this is not the initial beginner stage, it allows for the manifest distinctive contemplation of form, feeling, mind, etc.; hence it says "any one application of mindfulness cultivated in the present." Although one can collaterally cultivate the applications of mindfulness of other truths, the number does not exceed four, hence it says "four." As for "any single aspect cultivated in the present cultivates sixteen in the future," it is because one collaterally cultivates the other truths. Because contemplating the truth of cessation lacks other applications of mindfulness, the application of mindfulness on dharmas is cultivated in the present. Because one collaterally cultivates other truths, there are four in the future. Cultivation through practice in both the beginning and later stages is identical in being the application of mindfulness on dharmas.