Definition of Existential Therapy One survey taken by Corey suggests a definition of Existential Therapy include two key elements: Existential Therapy is essentially an approach to counseling and therapy rather than a firm theoretical model, it stresses core human conditions. Normally, personality development is based on the uniqueness of each individual. Sense of self develops from infancy. Self determination and a tendency toward growth are control ideas. Focus is on the present and on what one is becoming; that is the appro ....