  Being-in is not a ‘property’ which Dasein sometimes has and sometimes does not have, and without which it could be just as well as it could be with it. It is not the case that man ‘is’ and then has, by way of an extra, a relationship-of-Being towards the ‘world’—a world with which he provides himself occasionally. Dasein is never ‘proximally’ an entity which is, so to speak, free from Being-in, but which sometimes has the inclination to take up a ‘relationship’ towards the world. Taking up relationships towards the world is possible only because Dasein, as Being-in-the-world, is as it is. This state of Being does not arise just because some entity is present-at-hand outside of Dasein and meets up with it. Such an entity can ‘meet up with’ Dasein only in so far as it can, of its own accord, show itself within a world. (Being and Time 12: 84)