This document provides an overview of a class on aging and changes. It discusses metaphors used to conceptualize the lifespan, including circles, hills, and spirals. It then covers Erikson's epigenetic theory of psychosocial development across eight stages from infancy to old age. Finally, it discusses applying Baltes's life span development model to religion, spirituality, and aging, noting development is life-long and involves gains and losses within historical and contextual influences.