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"He had never been interested in stories at any age, and had never quite understood the basic concept. He'd never read a work of fiction all the way through. He did remember, as a small boy, being really annoyed at the depiction of Hickory Dickory Dock in a rag book of nursery rhymes because the clock in the drawing was completely wrong for the period."
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"Logic, n. The art of thinking and reasoning in strict accordance with the limitations and incapacities of the human misunderstanding. The basic of logic is the syllogism, consisting of a major and a minor premise and a conclusion - thus:Major Premise: Sixty men can do a piece of work sixty times as quickly as one man.Minor Premise: One man can dig a post-hole in sixty seconds; Therefore-Conclusion: Sixty men can dig a post-hole in one second.This may be called syllogism arithmetical, in which, by combining logic and mathematics, we obtain a double certainty and are twice blessed."

"It had to be a trick or you couldn't have done it."

"Be aware of this truth that the people on this earth could be joyous, if only they would live rationally and if they would contribute mutually to each others' welfare.This world is not a vale of sorrows if you will recognize discriminatingly what is truly excellent in it; and if you will avail yourself of it for mutual happiness and well-being. Therefore, let us explain as often as possible, and particularly at the departure of life, that we base our faith on firm foundations, on Truth for putting into action our ideas which do not depend on fables and ideas which Science has long ago proven to be false."

"You will remember that I remarked the other day, just before we went into the very simple problem presented by Miss Mary Sutherland, that for strange effects and extraordinary combinations we must go to life itself, which is always far more daring than any effort of the imagination."A proposition which I took the liberty of doubting."You did, Doctor, but none the less you must come round to my view, for otherwise I shall keep on piling fact upon fact on you until your reason breaks down under them and acknowledges me to be right."

"There's more to logic than identifying logical fallacies."

"Many people have said to me that I'm a mystic. I find that a bit mysterious. I just use logic and common sense for my philosophies."

"Not everyone understands what a completely rational process this is, this maintenance of a motorcycle. They think it's some kind of 'knack' or some kind of 'affinity for machines' in operation. They are right, but the knack is almost purely a process of reason, and most of the troubles are caused by what old time radio men called a 'short between the earphones,' failures to use the head properly. A motorcycle functions entirely in accordance with the laws of reason, and a study of the art of motorcycle maintenance is really a miniature study of the art of rationality itself."

"I was upset. I had always believed logic was a universal weapon and now I realized how its validity depended on the way it was employed."
Explore more quotes by Terry Pratchett


"The female mind is certainly a devious one, my lord." Vetinari looked at his secretary in surprise. "Well, of course it is. It has to deal with the male one."


"Night poured over the desert. It came suddenly, in purple. In the clear air, the stars drilled down out of the sky, reminding any thoughtful watcher that it is in the deserts and high places that religions are generated. When men see nothing but bottomless infinity over their heads they have always had a driving and desperate urge to find someone to put in the way."


"Gods didn't mind atheists, if they were deep, hot, fiery, atheists like Simony, who spend their whole life hating gods for not existing. That sort of atheism was a rock. It was nearly belief."


"It was octarine, the colour of magic. It was alive and glowing and vibrant and it was the undisputed pigment of the imagination, because wherever it appeared it was a sign that mere matter was a servant of the powers of the magical mind. It was enchantment itself.But Rincewind always thought it looked a sort of greenish-purple."


"A mirror can contain the reflection of the whole universe, a whole skyful of stars in a piece of silvered glass no thicker than a breath."


"He had the kind of real deep tan that rich people spent ages trying to achieve with expensive holidays and bits of tinfoil, when really all you need to do to obtain one is work your arse off in the open air everyday."


"Everybody has somebody. It could be a friend, a lover, a spouse, a writing partner, or even That One Person You See At The Coffee Shop each day. Sometimes they exist to comfort you. Sometimes they exist to drive you absolutely mad. Be open to either as a form of self-improvement."


"Being an absolute ruler today was not as simple as people thought. At least, it was not simple if your ambitions included being an absolute ruler tomorrow. There were subtleties. Oh, you could order men to smash down doors and drag people off the dungeons without trial, but too much of that sort of thing lacked style and anyway was bad for business, habit-forming and very, very dangerous for your health. A thinking tyrant, it seemed to Vetinari, had a much harder job than a ruler raised to power by some idiot vote-yourself-rich system like democracy. At least they could tell the people he was their fault."
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