Full Idea
Being-in-the-world is a phenomenon of 'care' with a tripartite structure: a) projection towards its possibilities, b) thrownness among those possibilities, so Dasein is not free, and c) fallenness among worldly possibilities, to neglect of its own.
Gist of Idea
Being-in-the-world is projection to possibilities, thrownness among them, and fallenness within them
Source
report of Martin Heidegger (Being and Time [1927]) by John D. Caputo - Heidegger p.227
Book Reference
'A Companion to Continental Philosophy', ed/tr. Critchley,S/Schroeder,W [Blackwell 1999], p.227
A Reaction
Sounds a bit Californian to me. Just living among the world's possibilities is evidently a bad thing, because you could be concentrating on yourself and your own development instead?