海德格爾同尼采一樣都係批判本體概念，佢認為此在永遠係一種在世（ being-in-the-world、Das In-der-Welt-Sein）嘅存在者。存在嘅基本形式唔係以一種主體或者客體嘅方式，而係以一種在世嘅統一形式，此在以在世嘅方式展開狀態中領會存在本身，呢種展開狀態就係“此”嘅本質含義。
Heidegger, like Nietzsche, is a critique of the concept of ontology, arguing that this being is always a being-in-the-world (Das In-der-Welt-Sein). The basic form of existence is not in the form of a subject or object, but in a unified form of being in the world, in which existence itself is grasped in the state of unfolding in the way of being in the world, and this state of expansion is the essential meaning of "this".