“... he was juggling issues and solving problems, which was why his brain had no space left for memories.”

“Man is the only animal for whom his own existence is a problem which he has to solve.”

“If the problem can be solved why worry? If the problem cannot be solved worrying will do you no good.”

“His mouth started to speak, but his brain decided it hadn't got anything to say yet and shut it again. His brain then started to contend with the problem of what his eyes told it they were looking at, but in doing so relinquished control of the mouth which promptly fell open again. Once more gathering up the jaw, his brain lost control of his left hand which then wandered around in an aimless fashion. For a second or so the brain tried to catch the left hand without letting go of the mouth and simultaneously tried to think about what was buried in the ice, which is probably why the legs went and Arthur dropped restfully to the ground.”

“Unlike him I had been unable to escape into the simple complexities of science. All he had to do was solve the mystery of the universe, which may be difficult but is not as difficult as living an ordinary life...(How happy scientists are! Why didn't we become scientists, Percival? They confront problems which can be solved. We don't know what we confront. Does it have a name?)”

“Each problem that I solved became a rule which served afterwards to solve other problems”