成唯識論述記 6.636

6.636

述曰：分別二見得四受俱，在極苦處執苦俱蘊為我、我所，及常見者與憂相應，境可憂故，唯不善故。斷見執樂俱蘊斷，亦與憂俱故，恐失樂故。故言翻此，喜、樂等可知。非在五識等故，無苦俱義。

The Commentary states: The discriminative two views obtain coexistence with the four feelings; in places of extreme suffering, grasping the aggregates associated with suffering as self or belonging to self, and the view of eternalism are associated with sorrow, because the object is sorrowful and because they are solely unwholesome. The view of annihilationism grasping aggregates associated with pleasure as terminating also coexists with sorrow, because one fears losing pleasure. Therefore it says that reversing this, joy, pleasure, and so forth may be understood. Since they are not in the five consciousnesses and so forth, they do not have the sense of coexisting with suffering.