Yogācārabhūmi-śāstra, Volume 34 (45)

Original text: 所以者何。以于爱等结处。生爱等结。于贪等缚处。生贪等缚。便能招集生老病死愁悲忧苦。一切扰恼纯大苦蕴。如是复于有漏有取。顺非苦乐一切蕴中。由不安隐行趣入苦行。所以者何。有漏有取。顺非苦乐一切诸蕴。粗重俱行。苦乐种子之所随逐。苦苦坏苦不解脱故。一切皆是无常灭法。

Explanation: Why is this said? Because where the bonds such as craving arise, bonds such as craving are produced; where the fetters such as greed arise, fetters such as greed are produced; thus one gathers together birth, old age, sickness, death, sorrow, grief, worry, and suffering—all afflictions and the aggregate of great suffering in its purity. In this way, again, in all the aggregates that are with outflows and subject to grasping, and that accord with feelings that are neither painful nor pleasant, one enters into the contemplative practice (vipaśyanā-caryā) of suffering through unsteady conduct. Why is this said? Because all the aggregates that are with outflows and subject to grasping, and that accord with feelings that are neither painful nor pleasant, operate together with the innate afflictive obstruction (kleśāvaraṇa), are pursued by the seeds of suffering and pleasure, and because the suffering of suffering and the suffering of decay are not liberated, all dharmas are impermanent dharmas of arising and ceasing.