“Mattia was right: the days had slipped over her skin like a solvent, one after the other, each removing a very thin layer of pigment from her tattoo, and from both of their memories. The outlines, like the circumstances, were still there, black and well delineated, but the colors had merged together until they faded into a dull, uniform tonality, a neutral absence of meaning.”

“Mattia thought that he and Alice were like that, twin primes, alone and lost, close but not close enough to really touch each other.”

“Mathematicians call them twin primes: pairs of prime numbers that are close to each other, almost neighbors, but between them there is always an even number that prevents them from truly touching. Numbers like 11 and 13, like 17 and 19, 41 and 43. If you have the patience to go on counting, you discover that these pairs gradually become rarer. You encounter increasingly isolated primes, lost in that silent, measured space made only of ciphers, and you develop a distressing presentiment that the pairs encountered up until that point were accidental, that solitude is the true destiny. Then, just when you’re about to surrender, when you no longer have the desire to go on counting, you come across another pair of twins, clutching each other tightly. There is a common conviction among mathematicians that however far you go, there will always be another two, even if no one can say where exactly, until they are discovered.Mattia thought that he and Alice were like that, twin primes, alone and lost, close but not close enough to really touch each other. He had never told her that. When he imagined confessing these things to her, the thin layer of sweat on his hands evaporated completely and for a good ten minutes he was no longer capable of touching anything.”

“she and Mattia were united by an invisible, elastic thread, buried under a pile of meaningless things, a thread that could exist only between two people like themselves: two people who had acknowledged their own solitude within the other.”

“Mattia was startled to find that he still had instincts, buried beneath the dense network of thoughts and abstractions that had woven itself around him.”

“Denis's love for Mattia had burned itself out, like a forgotten candle in an empty room, leaving behind a ravenous discontent.”

“Over the past year, since breaking up with Martin, she had begun to notice the foreignness of the place, to suffer from the chill that dried her skin and never really left her, even in the summer. And yet she couldn't make up her mind to leave. She depended on the place now; she had grown attached to it with the obstinacy with which people become attached only to things that hurt them.”