What glints on the other side of being?

From The Moment:

When I can’t write, when the building noise distracts me or when I have nothing to say, I so easily get outside myself. I’m not at home. Writing is a house of being under construction; sometimes you feel you’re living in rubble. But then the right sentence comes, the edifice rises up around you, and it is what was there all along. When this happens, the world lies open. You can get up from your desk and live in your home, kiss S., make plans with her.

Writing isn’t just a hall of mirrors, as I once thought. Nor is it a game. A sentence, even a banal one, when brought out of contemplation and written down, can be a practical act in its own way, like an act of faith. What happens when you write down a thought, when you start to blacken the screen? Often your subject eludes you. The words disperse. But doesn’t something happen nevertheless? No matter how unsure you are of what you’re saying, no matter how badly you fail to grasp it, doesn’t something take place in the saying itself that can give you strength to go on?

When we go through the woods, says Heidegger, we’re always already going through the word woods. Both the woods and the word were there before us, but it’s the going through them that brings them together. In a sense, the saying of the word summons the thing. Summons but doesn’t create. We can’t give being, but we can help unveil it.

But what is it that sometimes appears when word and thing come together? What glints on the other side of being? Celan once wrote that he saw God in a ray of light under his hotel door. Is it something like that: a ray of light under the door of a dark rented room?