SUBJECT & OBJECTIVES : The psychological aspect of pure life is connected with mental health. Therefore, it is one of the important elements of a good life that contributes to meaningful living. One cannot live a happy life and use the all faculties of his soul unless acquires inner peace. This article proposes interdisciplinary research that contains educational psychology, logic, and philosophy. We will indicate how fuzzy logic could change the human view of mental health and pure life. METHOD & FINDING : In this research, the terms mind and health will be considered to shed light on the concept of mental health. Firstly, we argue in favor of the dichotomy between mind and body. Then, the definition of health is analyzed by concepts of normality and irritating mode. Also, utilizing educational psychology, fuzzy thinking, and philosophy of mind, a new definition of mental health will be proposed. In general, it will be indicated that by holding fuzzy approaches to mental states, the definition of health and illness and its subcategories have new interpretations. CONCLUSION : Fuzzy thinking creates a new viewpoint that sees the world and its events as an integration of contradictions such as health-illness and meaningful-meaningless life. The more mental states match health norms, the happier life will be. Therefore, the talk of the grades of inner peace and happy life is possible unless is fuzzy logic applied.
