Selfhood is often imagined as an inner essence, fixed identity, or enduring substance that remains unchanged beneath the flow of experience. APS rejects this view.
Living systems undergo continual change. Cells are replaced, experiences accumulate, relationships evolve, and behaviour adapts to new circumstances. Yet organisms can maintain continuity despite this ongoing transformation. APS explains this continuity through organisation rather than substance.
Selfhood is the persistent organisation of integrated significance around the continuity of an agent. What persists is not a static thing but a dynamic pattern of organisation maintained through time.
This processual view is consistent with the broader APS understanding of life. Organisms persist through continual self-maintenance and reorganisation rather than through the preservation of fixed material components. Selfhood extends this principle into the cognitive domain.
In APS, the self is not an inner object that exists behind experience. It is an organisational achievement through which continuity is maintained across changing conditions, experiences, and forms of activity.