"What is the most focal point of the self?" This question leads Strasser along the line of the phenomenological process of regression. He starts with "man as being in situation, with his body opening to the world". Yet, he continues to find himself having different phases as the physical, physiological, and psychological aspects leading towards the soul as an incarnate spirit with intellect and wisll as his most basic faculties. Strasser's research fits perfectly with the inspection of Thomas Aquinas on the human soul.