Existential therapy is a philosophical approach to mental health. An existential therapist focuses on a client as a whole and in the present rather than on past experiences. The aim is to acknowledge the freedom humans have and help clients face the challenges of life by taking responsibility for the choices they make, find their own meaning, live more authentically, and live in the present.
In Optimistic Existentialism (a term I have created), I also incorporate Logotherapy. Logotherapy is founded upon the belief that striving to find meaning in life is the primary, most powerful motivating and driving force in humans. It was developed by neurologist and psychiatrist Viktor Frankl.