Although it has been given many names (that is, ‘self-actualization,’ ‘self-realization,’ ‘self-development,’ ‘development of potential,’ ‘growth,’ ‘autonomy,’ and so on), the underlying concept is simple: each human being has an innate set of capacities and potentials
Yalom establishes self-actualization as the common denominator beneath multiple humanistic and existential terminologies, grounding it in the Aristotelian concept of entelechy and the notion that unfulfilled potentiality produces existential guilt.
, Existential Psychotherapy, 1980thesis