Dasein is Heidegger’s way of referring both to the human being and to the type of Being that humans have. Its essence lies in its existence. It can respond to its circumstances, thereby choosing its ‘Being’. ‘Dasein’ is about the human being and its place in the world. Dasein is essentially in the world, because it continually interprets and engages with other entities and the contexts in which they lie. Only Dasein makes the world a unitary world at all, rather than a collection of entities. Dasein is the whole human being, and makes no distinction between body and mind. Heidegger rejected any purely psychological realm.