俱舍論疏 22.59

22.59

On the Śāstra's statement, "Others in this regard... speak of pleasure also as suffering": This is Kumāralāta's explanation. The essence of pleasant sensation is not suffering; it is called suffering due to three causes: first, because it can serve as a cause of suffering; second, because it can accumulate all sufferings; third, because having suffering, one hopes for pleasure. Due to these three causes, pleasure is spoken of as suffering.