“Since the mathematicians have invaded the theory of relativity I do not understand it myself any more.”

“[Modern scientific] theories can necessarily never be more than hypothetical, since their starting-point is wholly empirical, for facts in themselves are always susceptible of diverse explanations and so never have been and never will be able to guarantee the truth of any theory.”

“The truth, he thought, has never been of any real value to any human being - it is a symbol for mathematicians and philosophers to pursue. In human relations kindness and lies are worth a thousand truths.”

“I don't understand it any more than you do, but one thing I've learned is that you don't have to understand things for them to be.”

“Have you ever heard of the theory of relativity?"Artemis blinked. "Is this a joke? I have traveled through time, Doctor. I think I know a little something about relativity.”

“I am a mathematician, sir. I never permit myself to think.”