Lyn Hejinan writes in The Book of A Thousand Eyes:
“The bed is made of sentences which present themselves as what they are Some soft, some hardly logical, some broken off Sentences granting freedom to memories and sights” 
If a bed is made of sentences, then we take rest, converse with the unconscious, locate freedom, the intimate, night, dark, gestational silence, the forming of images and ideas — all within what can be built from an assortment of varied sentences. Sentences become our increment, lumber, and leisure.
Lisa Robertson writes in her recent book, Nilling, “The most temporary membranes serve as shelter.”
What is it about the sentence that encourages one to stretch out?