“Do you really like studying?"Mattia nodded."Why?""It's the only thing I know how to do," he said shortly. He wanted to tell her that he liked studying because you can do it alone, because all the things you study are already dead, cold, and chewed over. He wanted to tell her that the pages of the schoolbooks were all the same temperature, that they left you time to choose, that they never hurt you and you couldn't hurt them either. But he said nothing.”

“Why did you choose to stay here?" (...)"I don't know," he said. "It's as if there's more oxygen here.”

“You'll get used to it. In the end you won't even notice it anymore," he said."How is that possible? It will always be there, right before my eyes.""Exactly," said Mattia. "Which is precisely why you won't see it anymore.”

“Even though he was afraid to admit it, when he was with her it seemed it was worth doing all those normal things that normal people do.”

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

“We drove around for half an hour in search of two free parking spaces because you couldn't get into a single one," he said, to banish those thoughts. "It was just an excuse to keep you with me," Alice replied. "But you never understood anything.”

“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.”