The aim of this research is to make explicit the ontological subsoil that underpins the approach to and treatment of Interexistentiality as set out in chapter IV of the first section of Being and Time. First, we clarify conceptually the indications about everydayness and “absorption” in the world that appear in the general introduction of the aforementioned chapter; this explains that Interexistentiality is by no means necessarily entangled with impropriety. Second, we show that the (first) ontological subsoil is the “radical difference” between existence and presenceat-hand [Vorhandenheit] in the broad sense as “objectuality”; this difference is the basis that sustains the necessity of posing the question of who is Dasein in a way that corresponds to the dynamism inherent of the “self”, which can be performed in an appropriate I-self or an improper one-self who is ...

The aim of this article is to link the Heideggerian investigation of death —in its natural sense as a future fact and in its existential sense as an imminent possibility of existence— with Juan Ramón Jiménez’s poetic treatment of death, in whose poems both senses are present. Although the connection between the philosopher and the poet had already been noted by some researchers —though only in a limited way—, the novelty of the present article lies in showing in detail that, in the work of both authors, a reintegration of death into human existence takes place, through Heidegger's philosophical grounding and through the content that appears in certain poems by Juan Ramón Jiménez.