俱舍論記 24.56

24.56

「論曰至極有頂者」者，欲聖經生，若能勵力起得聖道、斷諸煩惱，必不生上，厭欲界生多苦惱故，恐生上界有長時苦同欲界故，故欲界經生不生上界。色界無苦，厭心劣故，故於色界經生聖者，容生無色。問：欲聖經生不生上界，欲聖經生亦應不更生欲。解云：雖於欲界經生聖者極生厭離，惑難斷故、道未熟故，所以更受欲界多生。若經生聖能起聖道，於此身中必斷惑盡，故不往彼上界受生。

Regarding [the text from] “The commentary says [...]” to “[...] the peak of existence,” when a noble person of the desire realm undergoes rebirth, if they are able to exert effort to generate the noble path and abandon all defilements, they definitely will not be reborn in a higher realm, because they feel intense disgust toward rebirth in the desire realm with its manifold suffering and distress, and fear that rebirth in a higher realm would entail long-lasting suffering similar to the desire realm; therefore, a noble person of the desire realm who has undergone rebirth is not reborn into a higher realm. The form realm has no suffering and the mind of disgust is weak; therefore, a noble person who undergoes rebirth in the form realm may be reborn into the formless [realm]. Question: If a noble person of the desire realm who has undergone rebirth is not reborn into a higher realm, a noble person of the desire realm who has undergone rebirth should likewise not be reborn again in the desire realm. The explanation says: Although a noble person who has undergone rebirth in the desire realm develops intense revulsion, because defilements are difficult to abandon and the path is not yet mature, they still take multiple rebirths in the desire realm. If a noble person who has undergone rebirth is able to generate the noble path, they will definitely exhaust defilements completely in this very body, and therefore do not go to be reborn in that higher realm.