The strong version:
 ó What it means to be is to show up: to be unconcealed.
 ó Without an understanding of being, nothing shows up as anything.
 ó A world is all-governing: everything that shows up at all shows up as intelligible in the light
  of that world.
 óÝEarth comes into its own only in its striving with world: it is what palpably resists being
  taken up by world, but it always does so in a particular way, within a specific rift-design.
 
 So, we can only ask about, and experience, things within the clearing, in the lighting of world.  It makes no sense to ask about what is apart from the clearing: even earth, as the self-concealing, as what resists unconcealment, is, and is in a particular way in its striving with world.
 

The weak version:
 ó Truth is essentially in the untruth: unconcealment is an ongoing happening, a winning out,
  always partial of being from concealment.
 ó Concealment (earth?) is the reservoir of the not-yet-uncovered (OWA 60): of the things and
  their aspects that might get lit up in some world. So some things are possible and others not.
 ó World discloses ëall the phenomena that distinguish the ageí (AWP 115), but that need not
  mean allÝthings whatsoever: some things are just ëbelow the radarí.
 ó Worlds are not static or totally totalizing: they come to incorporate more things and
  phenomena.
 óÝMarginal practices show up in a sufficiently intelligible way that they can be taken up in a
  new understanding of being by people.
 ó The attainment of a unified understanding of being is (supposed to be) a unique Western
  happening; surely other cultures experience and talk about things.
 
 So, there must be something outside of a clearing, at least some matter or stuff, perhaps some things or practices.  This stuff and/or things then get disclosed within worlds in various ways.  To the extent that we do experience that stuff, that un-unconcealed, it is as earth, in striving with   world, but we can determine that there must be stuff beyond the reach of our experience.
 

Questions:
 Does earth play a distinctive role in works of art?
 Does earth play roles of different importance in different understandings of being, or is it a
  general feature of all understandings of being?
 How is earth different from concealment?
 

Quotes:

ìIn essential striving, the opponents raise each other into the self-assertion of their natures.î (OWA 49)
ìThanks to this clearing, beings are unconcealed in certain changing degreesî (OWA 53)
ìThe earth is not simply the Closed but rather that which rises up as self-closing.  World and earth are always intrinsically and essentially in conflict, belligerent by nature.  Only as such do they enter into the conflict of clearing and concealing.  Earth juts through the world and world grounds itself on earth only so far as truth happens as the primal conflict between clearing and concealing.î (OWA 55)
ìTruth is untruth, insofar as there belongs to it the reservoir of the not-yet-uncovered, the un-uncovered, in the sense of concealmentî (OWA 60)
ì...truth works only by installing itself within a particular beingî (OWA 69)
ìDoes truth, then, arise out of nothing?  It does indeed if by nothing is meant the mere not of that which is, and if we here think of that which is as an object present in the ordinary way...Truth is never gathered from objects that are present and ordinary.  Rather, the opening up of the Open, the clearing of what is, happens only as the openness is projected, sketched out, that makes its advent in thrownness.î (OWA 71)
ìThe Greeks understand by Being the constant presence of something (BQ 67)î