One theme in Erik Erikson's work is the importance of finding a purpose for life. This article discusses the role of purpose in Erikson's writings and uses this review as a foundation for investigating Erikson's claims. Using a longitudinal sample of adolescents, Study 1 shows that identity and purpose development are intertwined processes insofar as increased commitment on one dimension corresponds to increased commitment on the other. Study 2 demonstrates that, although identity and purpose commitment are correlated, purpose commitment uniquely predicts Big Five personality trait levels, particularly for those traits related to maturity. Results are discussed as an impetus for future purpose development research and as support for largely unexamined Eriksonian claims.