In the article, based on the conception of Diatetik, developed by I. Kant, the authors consider the interrelation of physical, mental, and spiritual (moral) health. The authors define philosophy as the worldview science directed on achieving the complex health of a person, thus opening transcendental bases of moral philosophy. At the same time, Kant's ethics theology does not recognize former spiritualism (metaphysical, transcendental one). The moral theology has only immanent application, and all ideas of reason do not get speculative but imperative character. According to Kant, morality, instead of mind, is what makes someone an authentic individual. The philosopher speaks about the necessity of "ethical gymnastics." Physical health is only a part of wellbeing for the completeness of which it is necessary to add something purely moral. Kant believed, that the moral culture is needed for the physical integrity of human nature, that the moral philosophy is also a "universal medicine." He named culture of virtue moral ascetics and Diatetik, whose purpose is to contain oneself in morally healthy conditions.