In the light of four, traditional, rational, intuitional and experimental/ historical approaches, Ayatollah Shahabadi’s theory of fi?rah as an interdisciplinary anthropological theory seeks to outline an a priori structure of human existence, whose foundation is based on the intrinsic enthusiasm of soul towards the absolute perfection. He tries to explain his theory through the ontological analysis of the notion of fi?rah as a requirement for the existence of the perceiver as well as finding the tendencies peculiar to the human soul.