Why are the Five Aggregates of Grasping Dukkha? (from Early Buddhist Teachings, The Middle Position in Theory and Practice, by Y. Karunadasa, Hong Kong 2013)
Why are the five aggregates of grasping suffering? What we need to remember here is that it is not the five aggregates (pañca-khanda), but the five aggregates of grasping (pañca-upadanakkhandha) that are described as suffering. This distinction should show that although the five aggregates in themselves are not a source of suffering, they constitute suffering when they become objects of grasping (upadana). Strictly speaking, therefore, what Buddhism calls the individual in its samsaric dimension is not the five aggregates, but the five aggregates when they are grasped, appropriated, and clung to. That which is called individual existence can thus be reduced to a causally conditioned process of grasping. It is this process of grasping that Buddhism describes as suffering.
A yet another question that arises here is by whom are the five aggregates grasped? The answer to this question is that besides the process of grasping, there is no agent who performs the act of grasping. This answer may appear rather enigmatic; nevertheless it is understandable in the context of the Buddhist doctrine of not self and the Buddhist doctrine of dependent arising. What both doctrines seek to show is that the individual is a conditioning and conditioned process, without an agent either inside or outside of the process. The grasping-process manifests in three ways. This is mine (etam mama), this I am (eso’ham asmi), and this is my self (eso me atta). The first is due to craving (tanha), the second to conceit (mana), and the third is due to the mistaken belief in a self-entity (ditthi). It is through this process of the three-fold self-appropriation that the idea of “mine”, “I am” and “my self” arises. If there is a phenomenon called individuality in its samsaric dimension, it is entirely due to the superimposition of these three ideas on the five aggregates.
A this juncture, another question arises: why and how does the process of grasping lead to suffering? In answering this question, it is important to note here that the five aggregates that become the object of self-appropriation and grasping are in a state of constant change, in a state of continuous flux with no persisting substance. Their nature is such that they do not remain in the way we want them to remain. As such, the aggregates are not under our full control. Thus by identifying ourselves with what is impermanent (anicca), with what does not come under our full control (anatta), we come to suffering [dukkha]. This should explain why Buddhism traces the fact of suffering to the fact of impermanence (yad aniccam tam dukkham). When the process of self-appropriation and self-identification is terminated [by following the Noble Eightfold Path], suffering too comes to an end. As long as this process persists, there is suffering. The moment it stops, the samsaric process also ceases to be, and together with it all suffering comes to an end.