“A central assumption of this book has been that to examine the experience of humans throughout their 25,000 years on this continent is to hold up a mirror to the culture of Modern America.”

Mathematics Magazine, Vol. 23-24. (1949), p. 161
Context: Euclid taught me that without assumptions there is no proof. Therefore, in any argument, examine the assumptions. Then, in the alleged proof, be alert for inexplicit assumptions. Euclid's notorious oversights drove this lesson home.

Source: The Skeptical Inquirer, Vol. 25, (2001), p. 47

Pg. 304.
Against Method (1975)
Context: Is it not a fact that a learned physician is better equipped to diagnose and to cure an illness than a layman or the medicine-man of a primitive society? Is it not a fact that epidemics and dangerous individual diseases have disappeared only with the beginning of modern medicine? Must we not admit that technology has made tremendous advances since the rise of modern science? And are not the moon-shots a most and undeniable proof of its excellence? These are some of the questions which are thrown at the impudent wretch who dares to criticize the special positions of the sciences. The questions reach their polemical aim only if one assumes that the results of science which no one will deny have arisen without any help from non-scientific elements, and that they cannot be improved by an admixture of such elements either. "Unscientific" procedures such as the herbal lore of witches and cunning men, the astronomy of mystics, the treatment of the ill in primitive societies are totally without merit. Science alone gives us a useful astronomy, an effective medicine, a trustworthy technology. One must also assume that science owes its success to the correct method and not merely to a lucky accident. It was not a fortunate cosmological guess that led to progress, but the correct and cosmologically neutral handling of data. These are the assumptions we must make to give the questions the polemical force they are supposed to have. Not a single one of them stands up to closer examination.

Source: Défense des Lettres [In Defense of Letters] (1937), p. vii

De Abaitua interview (1998)
Context: There are books that have devastated continents, destroyed thousands. What war hasn’t been a war of fiction? All the religious wars certainly, or the fiction of communism versus the fiction of capitalism – ideas, fictions, shit that people make. They have made a vast impression on the real world. It is the real world. Are thoughts not real? I believe it was Wittgenstein who said a thought is a real event in space and time. I don’t quite agree about the space and time bit, Ludwig, but certainly a real event. It’s only science that cannot consider thought as a real event, and science is not reality. It’s a map of reality, and not a very good one. It’s good, it’s useful, but it has its limits. We have to realise that the map has its edges. One thing that is past the edge is any personal experience. That is why magic is a broader map to me, it includes science. It’s the kind of map we need if we are to survive psychologically in the age that is to come, whatever that is. We need a bigger map because the old one is based on an old universe where not many of us live anymore. We have to understand what we are dealing with here because it is dangerous. It kills people. Art kills.

Plunkitt of Tammany Hall, Chapter 22, A Parting Word on the Future of the Democratic Party in America

Preface
Literature and Dogma (1873)

Heretics and Heresies (1874)
Context: Nature never prompted a loving mother to throw her child into the Ganges. Nature never prompted men to exterminate each other for a difference of opinion concerning the baptism of infants. These crimes have been produced by religions filled with all that is illogical, cruel and hideous. These religions were produced for the most part by ignorance, tyranny and hypocrisy. Under the impression that the infinite ruler and creator of the universe had commanded the destruction of heretics and infidels, the church perpetrated all these crimes:
Men and women have been burned for thinking there is but one God; that there was none; that the Holy Ghost is younger than God; that God was somewhat older than his son; for insisting that good works will save a man without faith; that faith will do without good works; for declaring that a sweet babe will not be burned eternally, because its parents failed to have its head wet by a priest; for speaking of God as though he had a nose; for denying that Christ was his own father; for contending that three persons, rightly added together, make more than one; for believing in purgatory; for denying the reality of hell; for pretending that priests can forgive sins; for preaching that God is an essence; for denying that witches rode through the air on sticks; for doubting the total depravity of the human heart; for laughing at irresistible grace, predestination and particular redemption; for denying that good bread could be made of the body of a dead man; for pretending that the pope was not managing this world for God, and in the place of God; for disputing the efficacy of a vicarious atonement; for thinking the Virgin Mary was born like other people; for thinking that a man's rib was hardly sufficient to make a good-sized woman; for denying that God used his finger for a pen; for asserting that prayers are not answered, that diseases are not sent to punish unbelief; for denying the authority of the Bible; for having a Bible in their possession; for attending mass, and for refusing to attend; for wearing a surplice; for carrying a cross, and for refusing; for being a Catholic, and for being a Protestant; for being an Episcopalian, a Presbyterian, a Baptist, and for being a Quaker. In short, every virtue has been a crime, and every crime a virtue. The church has burned honesty and rewarded hypocrisy. And all this, because it was commanded by a book — a book that men had been taught implicitly to believe, long before they knew one word that was in it. They had been taught that to doubt the truth of this book — to examine it, even — was a crime of such enormity that it could not be forgiven, either in this world or in the next.

Auf eine ähnliche Weise sollen in der vollkommnen Litteratur alle Bücher nur Ein Buch seyn, und in einem solchen ewig werdenden Buche wird das Evangelium der Menschheit und der Bildung offenbart werden.
“Ideas,” Lucinde and the Fragments, P. Firchow, trans. (1991), § 95