一扇门(the door)
　　everything (he kept saying) is something it isn't. and everybody is always somewhere else. maybe it was the city, being in the city, that made him feel how queer everything was and that it was something else. maybe (he kept thinking) it was the names of the things. the names were tex and frequently koid. or they were flex and oid or they were duroid (sand) or flexsan (duro), but everything was glass (but not quite glass) and the thing that you touched (the surface, washable, crease-resistant) was rubber, only it wasn't quite rubber and you didn't quite touch it but almost. the wall, which was glass but turned out on being approached not to be a wall, it was something else, it was an opening or doorway--and the doorway (through which he saw himself approaching) turned out to be something else, it was a wall. and what he had eaten not having agreed with him. www•
　　he was in a washable house, but he wasn't sure. now about those rats, he kept saying to himself. he meant the rats that the professor had driven crazy by forcing them to deal with problems which were beyond the scope of rats, the insoluble problems. he meant the rats that had been trained to jump at the square card with the circle in the middle, and the card (because it was something it wasn't) would give way and let the rat into a place where the food was, but then one day it would be a trick played on the rat, and the card would be changed, and the rat would jump but the card wouldn't give way, and it was an impossible situation (for a rat) and the rat would go insane and into its eyes would come the unspeakably bright imploring look of the frustrated, and after the convulsions were over and the frantic racing around, then the passive stage would set in and the willingness to let anything be done to it, even if it was something else.
　　he didn't know which door (or wall) or opening in the house to jump at, to get through, because one was an opening that wasn't a door (it was a void, or kid) and the other was a wall that wasn't an opening, it was a sanitary cupboard of the same color. he caught a glimpse of his eyes staring into his eyes, in the and in them was the expression he had seen in the picture of the rats--weary after convulsions and the frantic racing around, when they were willing and did not mind having anything done to them. more and more (he kept saying) i am confronted by a problem which is incapable of solution (for this time even if he chose the right door, there would be no food behind it) and that is what madness is, and things seeming different from what they are. he heard, in the house where he was, in the city to which he had gone (as toward a door which might, or might not, give way), a noise--not a loud noise but more of a low prefabricated humming. it came from a place in the base of the wall (or stat) where the flue carrying the filterable air was, and not far from the minipiano, which was made of the same material nailbrushes are made of, and which was under the stairs. 'this, too, has been tested,' she said, pointing, but not at it, 'and found viable.' it wasn't a loud noise, he kept thinking, sorry that he had seen his eyes, even though it was through his own eyes that he had seen them.