ENThe concept of facticity that was developed by Heidegger from 1919 to 1923 composes the basis of all his further thought: the conceptions of Dasein and ontological temporality will originate namely from this concept. The article analyzes various expressions of the factitious life (care, Er-eignis, life, Self- Destruction, meaningfulness, death), yet the special consideration is paid to its religious aspects. Really the essence of facticity is treated by Heidegger as a temporality that is essentially correlated with the Christian experience. The influence of Saint Augustine to Heidegger and the Heideggerian concept of methodical atheism are analyzed and this analysis raises the intricate problem of the relation of the Black Forest philosopher to Christian faith and to God. Keywords: Heidegger, hermeneutics, facticity, religious, care, Er-eignis, life, temporality. [From the publication]