This document discusses several theories of self and identity, including Erik Erikson's stages of development. It notes that Erikson believed trust vs mistrust in early childhood was crucial and shaped future development. It also discusses Sigmund Freud and Heinz Kohut's perspectives on psychoanalysis and focusing on a patient's present needs. The document concludes that no single theory fully explains identity and that using an eclectic approach considering genetics, strengths, experiences and personal growth best allows individuals to understand themselves.