M. John Harrison said this quote

Dreamworlds can maintain themselves only as glimpses. Once the writer transports the reader across the threshold, nothing that was promised can be delivered. What was ominous becomes ordinary; what was bizarre, quotidian. Unless you simply keep upping the ante, piling on the bullshit, the only way to revive things is to switch perspectives as quickly as you can.

~ M. John Harrison

Egnaro is a secret known to everyone but yourself.It is a country or a city to which you have never been; it is an unknown language. At the same time it is like being cuckolded, or plotted against. It is part of the universe of events which will never wholly reveal itself to you: a conspiracy the barest outline of which, once visible, will gall you forever.

~ M. John Harrison

Every moment of a science fiction story must represent the triumph of writing over worldbuilding.Worldbuilding is dull. Worldbuilding literalises the urge to invent. Worldbuilding gives an unnecessary permission for acts of writing (indeed, for acts of reading). Worldbuilding numbs the reader’s ability to fulfil their part of the bargain, because it believes that it has to do everything around here if anything is going to get done.Above all, worldbuilding is not technically necessary. It is the great clomping foot of nerdism. It is the attempt to exhaustively survey a place that isn’t there. A good writer would never try to do that, even with a place that is there. It isn’t possible, & if it was the results wouldn’t be readable: they would constitute not a book but the biggest library ever built, a hallowed place of dedication & lifelong study. This gives us a clue to the psychological type of the worldbuilder & the worldbuilder’s victim, & makes us very afraid.

~ M. John Harrison

What is literature, and why do I try to write about it? I don’t know. Likewise, I don’t know why I go on living, most of the time. But this not knowing is precisely what I want to preserve. As readers, the closest way we can engage with a literary work is to protect its indeterminacy; to return ourselves and it to a place that precludes complete recognition. Really, when I’m reading, all I want is to stand amazed in front of an unknown object at odds with the world.

~ M. John Harrison