“A computer chatted to itself in alarm as it noticed an airlock open and close itself for no apparent reason.This was because Reason was in fact out to lunch.”

“The Googleplex Star Thinker is a super-computer from the Seventh Galaxy of Light and Ingenuity and has the ability to calculate the trajectory of every single dust particle during a five-week Dangrabad Beta sand blizzard.The Deep Thought computer call it a pocket calculator in comparison to itself.”

“For seven and a half million years, Deep Thought computed and calculated, and in the end announced that the answer was in fact 42- and so another, even bigger, computer had to be built to find out what the actual question was.”

“We notice things that don't work. We don't notice things that do. We notice computers, we don't notice pennies. We notice e-book readers, we don't notice books.”

“The car shot forward straight into the circle of light, and suddenly Arthur had a fairly clear idea of what infinity looked like.It wasn’t infinity in fact. Infinity itself looks flat and uninteresting. Looking up into the night sky is looking into infinity—distance is incomprehensible and therefore meaningless. The chamber into which the aircar emerged was anything but infinite, it was just very very very big, so big that it gave the impression of infinity far better than infinity itself.”

“Let the past hold on to itself and let the present move forward into the future.”

“Proving nothing," said Ford. "I wouldn't trust that computer to speak my weight.""I can do that for you, sure," enthused the computer, punching out more ticker tape. "I can even work out your personality problems to ten decimal places if it will help.”