Because van der Leeuw, like Kristensen, appropriates Otto's concept of "das Heilige" in defining the essential category of religion, the transcendence becoming revealed in all human understanding can be further described as sacred — an overpowering “wholly other,” which becomes revealed in astonishing moments of dreadful awe ("Scheu") and wonderful fascination. Van der Leeuw argues that this concept of religious dread is also present in Kierkegaard's work on "Angst" and in Heidegger's statement that “what arouses dread is ‘being in the world’ itself”. Moreover, van der Leeuw recognizes that, although dreadful, Being-in-the-world is fundamentally characterized as ("Sorge"), the existential structure whereby "Dasein" is concerned with meaningful relationships in the world alongside other beings.