瑜伽師地論略纂 14.97

14.97

論云「非唯變壞。已離憂者，雖復遇彼，不為害故」者，謂樂受非唯變壞時名苦，即樂受變壞及所生憂是壞苦故。故第三果以去離憂者，雖遇彼變壞，不為損惱，以無憂故。故知壞苦通於二種：一、樂受自性；二、樂受變壞時。是此中意也。

Regarding where the treatise states, “It is not merely deterioration. For one who has already separated from grief, even though encountering it again, is not harmed by it”: this means that pleasurable feeling is called suffering not only when it deteriorates, for the deterioration of pleasurable feeling and the grief produced thereby are the suffering of deterioration. Therefore, those from the third fruit onward who have separated from grief, although encountering that deterioration, are not harmed or afflicted, because they have no grief. Thus we know that the suffering of deterioration encompasses two kinds: first, the intrinsic nature of pleasurable feeling; second, the time when pleasurable feeling deteriorates. This is the meaning here.