It could seem we are dealing with simple inversions: u is inverted n, while V is inverted A. At the first glance this is so, at the second glance this is so, too, though a bit less. Then this is not. Unless we deal with non-simple inversions, with inversions complicated and complex. Let's take V. It has no bar. There is nothing we can sit on. We have to stand on the head – we have to sit on the head. The space above us is not closed, not concentrated and not concentrating, not contracted and not contracting – the space above us is open, distracted and distracting, dispersed and dispersing.   But what are the trenches for: to think and meditate in them? No, trenches are to give us a shelter – we can lie, sit, walk, run in them, while above our heads whiz words, phrases, sentences, even paragraphs, roaring and howling. And they make no harm to us. We are save. They don't hit us. Let them whiz, roar and howl of anger – we are save. We calmly go on digging..... . Go on drawing..... Like moles......

Trenches are like  interline spaces. Interline spaces are like trenches. We can hide in them. Crouch  down. Take a rest. Get safely  to the margins.... But maybe it is the other way  round: the letters are trenches  dug in the white page, like in  a lime rock. They pretend they  help us to get out of this white emptiness..... Or we pretend they  help us. With no doubt they help us to go round and round. They make a huge labyrinth with no exit, which pretend to be an open space with no boundaries and limits.....