Other Roberts

Michael Symmons Roberts (no relation) knows why the world is so mournful.

That's why rivers dry to scabs,
that's why the grass weeps every dawn,
that's why the wind feels raw. ['Pelt', 2005]

It's because 'the earth is an open wound'.  But what he doesn't say, in this poem (although he implies it, in this poem) is that wounds heal; and that scabs, like tears, and the feeling of being raw, are symptoms of that healing.