M. John Harrison On Umwelts

“The material universe, it would appear, has little absolute substance. It hardly exists. It is a rag of matter, a wisp of gas, a memory of some former state. Each sentient species perceives the thin evidence of this state in a different way, generating out of this perception its physical and metaphysical Umwelt: its little bubble or envelope of ‘reality.’ These perceptual systems are hermetic and admit of no alternative . They are the product of a particular set of sense organs, evolutionary beginnings, and planetary origins. If the cat were to define the world, he would exclude the world of the housefly in his mouth. Each species has its fiction, and that fiction is to all intents and purposes real; and the actual thin substance of the universe becomes more and more debatable, oneiric, hard to achieve, like the white figures that will not focus at the edge of vision. . . .”

Viriconium
by M. John Harrison
Kindle Locations 4729-4735