The paper deals with the problem of the historical incorporation of Greek metaphysics into Christian theology. The adopted approach is inspired by Martin Heidegger's ideas. Heidegger identified the platform for the incorporation of Greek metaphysics into Christian theology with the understanding of thinking as uncovering of being as being. According to Heidegger, every reductive understanding of thinking has a common source, which is the objectification of thinking. In Western tradition it leads to the hegemony of logic. Logical basis of metaphysics gave rise to onto-theological structure in both: in the thought of ancient Greeks (according to Heidegger this is already the case with Aristotle) as well as in Christian theology. Through the presentation of Heidegger's analysis, the paper calls for rethinking the nature of metaphysics and theology, as well as for rethinking the relations between modern philosophical and theological conceptions.