Good books tell the truth, even when they're about things that never have been and never will be. They're truthful in a different way

Nothing, my dear and clever colleague, is not your run-of-the-mill nothing, the result of idleness and inactivity, but dynamic, aggressive Nothingness, that is to say, perfect, unique, ubiquitous, in other words Nonexistence, ultimate and supreme.

No one reads; if someone does read, he doesn't understand; if he understands, he immediately forgets.

A smart machine will first consider which is more worth its while: to perform the given task or, instead, to figure some way out of it.

I have to admit that he was not bad at combinatorial analysis - a branch, however, that even then I considered to be dried up.

Of the two powers, the two categories that take possession of us when we enter the world (from where?), space is by far the less mysterious. It, too, undergoes transformations. Time, on the other hand, is a hostile element, truly treacherous, I would even say against human nature.

You climb to reach the summit, but once there, discover that all roads lead down.