Dasein relates to the world through apprehending its Things which are ready-at-hand, as Heidegger says. The importance of the world in all its senses is, for Heidegger, not so much the Kantian things-in-themselves or the actual (ontical) entities; rather, it is the significance of these Things insofar as they are beneficial to the Dasein's Being-in-the-world.

¶ 7:39 AM