I would like to add to the latest comment that of course Heidegger was influenenced by his teacher, Husserl.  For example, Husserl initiaited the idea of the first sensation of space is "near Nd far.'  Ortega y Gaset followed him in this.  Heidegger did likewise, call ing things of immediate or practical interest to Dasein "zuhande" and things in the background "vorhande."  This is in his early work, Sein und Zeit.
But later he freedhimself slowly from Husserl's grasp, and the terminology is entirely hiw own.  HIs goal was always the same: to free philosophy from the dead hand of metaphysics, which I think was either impossible or very close to impossible.  Aristotle said philosophy begins in wonder.  Heidegger Hwanted to inspire wonder at the end of "investigations."