The article in a broad perspective presents the various proposition describing the explanation of human transience, and stigma of death, as the source of existential fear. The methodological approach adopted for the article, notices reflection on a subject in four plains of philosophy, sociology, psychology, but largely bioethics (and especially thanatology). The text touches upon the metaphysical concerns, in a sense that the human demise is considered as insecurity, mentally rooted in social representation of transience. Such a mode of reasoning is established understanding that the concept of a human corpse becomes a manifestation of an intelligible, through the evolution of life from the state of existence to nonexistence. Recognition of “deadness” as the natural order, seen as the paradox of human existence, persisted in the richness of thoughts, projects, and hopes. In opposition to this perception of life (or rather of impermanence), the authors take the position which excludes the passing away understood as a form of non-existence of consciousness. Views presented through this proposition rest on a fundament of contemporary researches of medicine (e.g., psychiatry, oncology, cardiology, or psychology). From this perspective, the article is a new proposition of a research that can be grounded in contemporary security studies.