2. The “only” in this sentence is meant to exclude reference to an entity that can be identified independently of the aggregates. Even though he says here that the conception of a self or person refers to a continuum of aggregates, his view, strictly speaking, is that it refers to a collection of aggregates that exist in a causal continuum powered by actions contaminated by the mistaken view of a self. The collection of aggregates to which the conception refers includes phenomena of two sorts, material and mental. These material and mental phenomena are called “aggregates” primarily because they are not united in or by a substantially real underlying support.