Abstract: This article explains the dichotomous phenomenon of rationality with religious belief in man. Both phenomena are represented here by Moses (faith and holiness) and Spinoza (rationalism and pantheism). This very early psychological phenomenon was discussed in anthropological research by Durkheim and Claude Levi Strauss, whose conclusions are consistent with the fact that these two approaches are combined allowing the rational person to contain both opposites. After presenting the background to this phenomenon, Spinoza's pantheistic approach will be discussed. We continue with Moshe's approach to holiness based on Scripture and its interpretation, while comparing the two approaches in a comparative study close to the original texts. The discussion will lead to the limitations of reason and the need for faith to fulfill it. An explanation of this need will be presented in Durkheim and Strauss`s interpretation as a phenomenon incorporated within spirit of man as his desire to exist. The article concludes that this existential aspiration is a metaphysical phenomenon.