Why does Hume reject the idea of self identity?

David Hume rejects the idea of self-identity by arguing that the self is not a constant, unchanging entity but rather a bundle of perceptions that are in constant flux. He contends that when we introspect, we find only fleeting thoughts, sensations, and experiences, rather than a stable self. Hume believes that the notion of a permanent self is an illusion, as our identity is shaped by the continuity and connections between these perceptions rather than a singular, enduring essence. Ultimately, he suggests that our concept of self is a mental construct rather than an inherent reality.