itself in existing. How is the disclosive understanding of being belonging to Dasein possible at all? Can the question be answered by going back to the primordial constitution of being of Dasein that understands being? The existential and ontological constitution of the totality of Dasein is grounded in temporality. Accordingly, a primordial mode of temporalizing of ecstatic temporality itself must make the ecstatic project of being in general possible. How is this mode of the temporalizing of temporality to be interpreted? Is there a way leading from primordial time to the meaning of being? Does time itself reveal itself as the horizon of being?