This study reinterprets ego identity beyond the fixed developmental models of traditional psychology and proposes a new conceptual model from a self-level perspective. Traditional theories, which have mainly emphasized adolescence, have not sufficiently accounted for the fluidity and reconfiguration of identity during life transitions. Accordingly, this research shifts the focus from whether identity is achieved to the question of at what level of self it is formed and operates. By integrating insights from developmental psychology, counseling theory, and neuroscience, the study demonstrates that the higher self functions as a dynamic mechanism that integrates and reorganizes lower self-dimensions. Based on this framework, a model intersecting identity achievement with higher self realization is proposed. While this model is broadly applicable across the lifespan, it holds particular significance for understanding the identity crises of middle-aged women as opportunities for growth and transformation. This perspective provides new theoretical foundatio
