Existential psychotherapy developed from existential philosophers, such as Nietzsche, Kierkegaard, Heidegger and Sartre and over time emerged in many streams of humanistic and relational psychology. Existential psychotherapy is concerned with helping people accept and come to terms with concepts such as death, isolation, meaninglessness, freedom and personal responsibility. Where a person may have previously experienced deep anxiety or despair, this therapy helps them to find meaning and purpose in their future by promoting self-awareness, self-acceptance and self-motivated action.