“Reality isn’t the most pleasant of atmospheres, Lieutenant. But we like to think we’re engineered for it. It’s a pretty fine piece of engineering, the kind an engineer can respect. Drag in an obsession and reality can’t tolerate it. Something has to give; if reality goes, your fine piece of engineering is left with nothing to operate on. Nothing it was designed to operate on. So it operates badly. So kick the obsession out; start functioning the way you were designed to function.”

“Create a world in which these things do or do not exist, or in which they are extended in some way. Test reality against this fiction. The reader will recognize the world that you're talking about, even though it may be another one altogether”

“Nothing is always absolutely so”

“The real world just doesn’t offer up as easily the carefully designed pleasures, the thrilling challenges, and the powerful social bonding afforded by virtual environments. Reality doesn’t motivate us as effectively. Reality isn’t engineered to maximize our potential. Reality wasn’t designed from the bottom up to make us happy.”

“Babbage's Three Laws of Difference EnginesFirst Law: A difference engine must have at least six cogs.Second Law: A difference engine must be able to operate a loom.Third law: A difference engine must be able to kill a man, should the mood so take it.”

“There was such a rush about me: wing, and tangled spray, and colors upon colors and shades of colors that were not colors at all but shifts of white and silver. If light like that were sound, it would sound like the sea on sand, and if my ears were eyes, they would see such a light.I crouched there, gasping in the swirl of it, and a flood struck me, shallow and swift, turning up and outward like flower petals where it touched my knees, then soaking me to the waist in its bubble and crash. I pressed my knuckles to my eyes so they would open again. The sea on my lips with the taste of tears and the whole white night shouted and wept aloud.”

“There is in certain living souls a quality of loneliness unspeakable, so great it must be shared as company is shared by lesser beings. Such a loneliness is mine; so know by this that in immensity there is one lonelier than you.”