Samuel R. Delany said this quote
“ ...I looked out the window at walls of moonlit cloud rising beside us as though we we were at the bottom of some, gray and ivory canyon, hung above the moon-smashed sea...But, with whatever hindsight, I suppose the reason that I want to close on a consideration of these words is that the moon-solid progress through high, drifting cumulus is — read them again — at the very opposite of what we perceive on a liquid's tilting and untilting top, and so becomes the other privileged pole among the images of this study, this essay, this memoir. Or perhaps, as it is only a clause whose syntactic place has been questioned by my own unscholarly researches, I merely want to fix it before it vanishes like water, like light, like the play between them we only suggest, but never master, with the word motion. ”