“There was no room for dust devils in the laws of physics, as least in the rigid form in which they were usually taught. There is a kind of unspoken collusion going on in mainstream science education: you get your competent but bored, insecure and hence stodgy teacher talking to an audience divided between engineering students, who are going to be responsible for making bridges that won’t fall down or airplanes that won’t suddenly plunge vertically into the ground at six hundred miles an hour, and who by definition get sweaty palms and vindictive attitudes when their teacher suddenly veers off track and begins raving about wild and completely nonintuitive phenomena; and physics students, who derive much of their self-esteem from knowing that they are smarter and morally purer than the engineering students, and who by definition don’t want to hear about anything that makes no fucking sense. This collusion results in the professor saying: (something along the lines of) dust is heavier than air, therefore it falls until it hits the ground. That’s all there is to know about dust. The engineers love it because they like their issues dead and crucified like butterflies under glass. The physicists love it because they want to think they understand everything. No one asks difficult questions. And outside the windows, the dust devils continue to gambol across the campus.”

“This was probably rooted in a belief that had been inculcated to him from the get-go: that there was an objective reality, which all people worth talking to could observe and understand, and that there was no point in arguing about anything that could be so observed and so understood. As long as you made a point of hanging out exclusively with people who had the wit to see and to understand that objective reality, you didn’t have to waste a lot of time talking. When a thunderstorm was headed your way across the prairie, you took the washing down from the line and closed the windows. It wasn’t necessary to have a meeting about it. The sales force didn’t need to get involved.”

“The full cosmos consists of the physical stuff and consciousness. Take away consciousness and it's only dust; add consciousness and you get things, ideas, and time.”

“Ask a Soviet engineer to design a pair of shoes and he’ll come up with something that looks like the boxes that the shoes came in; ask him to make something that will massacre Germans, and he turns into Thomas Fucking Edison.”

“It felt like we were reliving the first day of the school year, when students and teachers do the get-to-know-you dance—teachers tell students something about who they are, students pretend to care, and then vice-versa.”

“My men think you are dead now, and won’t waste balls on you,” Jack said. “In fact I have let you live, but for one purpose only: so that you can make your way back to Paris and tell them the following: that the deed you are about to witness was done for a woman, whose name I will not say, for she knows who she is; and that it was done by ‘Half-Cocked’ Jack Shaftoe, L’Emmerdeur, the King of the Vagabonds, Ali Zaybak: Quicksilver!”

“If he would just work with pure ideas like a proper mathematician he could go as fast as thought. As it happens, Alan has become fascinated by the incarnations of pure ideas in the physical world. The underlying math of the universe is like the light streaming in through the window. Alan is not satisfied with merely knowing that it streams in. He blows smoke into the air to make the light visible. He sits in meadows gazing at pine cones and flowers, tracing the mathematical patterns in their structure, and he dreams about electron winds blowing over the glowing filaments and screens of radio tubes, and, in their surges and eddies, capturing something of what is going on in his own brain. Turing is neither a mortal nor a god. He is Antaeus. That he bridges the mathematical and physical worlds is his strength and his weakness.”