“Real data is messy. ...It's all very noisy out there. Very hard to spot the tune. Like a piano in the next room, it's playing your song, but unfortunately it's out of whack, some of the strings are missing, and the pianist is tone deaf and drunk- I mean, the noise! Impossible! ”

“Comparing what we're looking for misses the point. It's wanting to know that makes us matter. Otherwise we're going out the way we came in. That's why you can't believe in the afterlife, Valentine. Believe in the after, by all means, but not the life. Believe in God, the soul, the spirit, the infinite, believe in angels if you like, but not in the great celestial get-together for an exchange of views. If the answers are in the back of the book I can wait, but what a drag. Better to struggle on knowing that failure is final.”

“It's where we're nearest to our humanness. Useless knowledge for its own sake. Useful knowledge is good, too, but it's for the faint-hearted, an elaboration of the real thing, which is only to shine some light, it doesn't matter where on what, it's the light itself, against the darkness, it's what's left of God's purpose when you take away God.”

“the natural condition is one of insurmountable obstacles on the road to imminent disaster. strangely enough it all works out in the end... it's a mystery.”

“The universe is deterministic all right, just like Newton said, I mean it's trying to be, but the only thing going wrong is people fancying people who aren't supposed to be in that part of the plan.”

“We shed as we pick up, like travelers who must carry everything in their arms, and what we let fall will be picked up by those behind. The procession is very long and life is very short. We die on the march. But there is nothing outside the march so nothing can be lost to it. The missing plays of Sophocles will turn up piece by piece, or be written again in another language. Ancient cures for diseases will reveal themselves once more. Mathematical discoveries glimpsed and lost to view will have their time again.”

“We must be born with an intuition of mortality. Before we know the word for it. Before we know that there are words. Out we come, bloodied and squalling, with the knowledge that for all the points of the compass, there's only one direction. And time is its only measure.”