In this article Iassert that young Heideggers’s 1920/21 lecture notes Phänomenologie des religiösen Lebens (1995) should be considered as post-ethical philosophy of religion which reflects his first “kehre” fromacademic theology to phenomenology of religion. To support thisassertion I analyze “factical life experience,” which is the key concept of the lecture Introduction to the phenomenology of religion in the notes. I demonstrate that through this concept Heidegger attempts to return to the primordial experience of life by showing the phenomenological form of the earlyChristian community’s religiousexperience. Thus, Heidegger’s phenomenology of religion should be understood not as a discovery of the influence of Christian theology on his philosophy, but rather as arevealing ofthe primordial origin of the post-ethical lifewhich is lost through theology in pursuit of rigidity of Wissenschaft. This clarification will open the way to a philosophy of religion that provides the depth of phenomenological insight for theology and lead it toself-critical examinationsof its own objectification of life.