A Courier has to establish space on the pavement. Predictable law-abiding behavior lulls drivers. They mentally assign you to a little box in the lane, assume you will stay there, can't handle it when you leave that little box.

— Neal Stephenson

A few dud universes can really clutter up your basement.

— Neal Stephenson

And so from then onwards, Daniel understood that the point of this grueling sundial project was not merely to plot the curve but to understand why each curve was shaped as it was. To put it another way, Isaac wanted to be able to walk up to a blank wall on a cloudy day, stab a groom into it, and draw all the curves simply by knowing where shadow would pass. This was the same thing as knowing where the sun would be in the sky and that was the same as knowing where the Earth was in its circuit around the sun, and in its daily rotation. Though as months went on, Daniel understood that Isaac wanted to be able to do the same thing even if the blank wall happened to be situated on, say, the moon that Christiaan Huygens had lately discovered revolving around Saturn. Exactly how this might be accomplished was a question with ramifications that extended into such fields as would Isaac, and Daniel for that matter, be thrown out of Trinity College? Were the Earth and all the works of man nearing the end of a long, relentless decay that had begun with the expulsion from Eden, and that would very soon culminate in the apocalypse? Or might things actually be getting better, with the promise of continuing to do so? Did people have souls? Did they have free will?

— Neal Stephenson

And yet all the gold is in England, it is dug up from Portuguese and Spanish mines, but it flows by some occult power of attraction to the Tower of London.” “Flows,” Caroline repeated. “Flows, like a current.” Sophie nodded. “And the English have grown so used to this that they use ‘currency’ as a synonym for money, as if no distinction need be observed between them.

— Neal Stephenson

An old market had stood there until I'd been about six years old, when the authorities had renamed it the Old Market, destroyed it, and built a new market devoted to selling T-shirts and other objects with pictures of the old market. Meanwhile, the people who had operated the little stalls in the old market had gone elsewhere and set up a thing on the edge of town that was now called the New Market even though it was actually the old market.

— Neal Stephenson

A red dragonfly hovers above a backwater of the stream, its wings moving so fast that the eye sees not wings in movement but a probability distribution of where the wings might be, like electron orbitals: a quantum-mechanical effect that maybe explains why the insect can apparently teleport from one place to another, disappearing from one point and reappearing a couple of meters away, without seeming to pass through the space in between. There sure is a lot of bright stuff in the jungle. Randy figures that, in the natural world, anything that is colored so brightly must be some kind of serious evolutionary badass.

— Neal Stephenson

Ares always reemerges from the chaos. It will never go away. Athenian civilization defends itself from the forces of Ares with Métis, or technology. Technology is built on science. Science is like the alchemists' uroboros, continually eating its own tail. The process of science doesn't work unless young scientists have the freedom to attack and tear down old dogmas, to engage in an ongoing Titanomachia. Science flourishes where art and free speech flourish.

— Neal Stephenson

But if life were a mellow elementary school run by well-meaning education Ph.D.s, the Delineator’s report card would say: "Hero is so bright and creative but needs to work harder on his cooperation skills.

— Neal Stephenson

Chester nods all the way through this, but does not rudely interrupt Randy as a younger nerd would. Your younger nerd takes offense quickly when someone near him begins to utter declarative sentences, because he reads into it a assertion that he, the nerd, does not already know the information being imparted. But your older nerd has more self-confidence, and besides, understands that frequently people need to think out loud. And highly advanced nerds will furthermore understand that uttering declarative sentences whose contents are already known to all present is part of the social process of making conversation and therefore should not be construed as aggression under any circumstances.

— Neal Stephenson

...crossed the room to where a selection of implements was arranged on a table-top. These could have been mistaken for the trade tools of a cook, physician, or torturer, save for the fact that the surface on which they rested was a slab of polished pink marble, topping a white and gilt dressing table-cum-sculpture, done up in the new, hyper-Baroque style named Rococo. It was adorned, for example, with several cherubs, bows drawn, eyes squint, as they drew beads on unseen targets, butt cheeks polished to a luster with jeweler’s rouge. It had, in other words, all the earmarks of a gift that had been sent to the princess by someone with a lot of money who did not know her very well.

— Neal Stephenson