Robert Grosseteste and the Origins of Experimental Science 1100-1700 (1953)
“It was not until the Twelfth Century of our era that the Pentateuch as a whole was subjected to rational scrutiny.”
H. L. Mencken, Treatise on the Gods (1930)
Context: It was not until the Twelfth Century of our era that the Pentateuch as a whole was subjected to rational scrutiny. The man who undertook the ungrateful task was a learned Spanish rabbi, Abraham ben Meir ibn Esra. He unearthed many absurdities, but... it was not until five hundred years later that anything properly describable as scientific criticism... came into being. Its earliest shining lights were the English philosopher Thomas Hobbes [with his Leviathan], and the Amsterdam Jew, Baruch Spinoza. Spinoza's "Tractatus Theologico-politicus", published in 1670, made the first really formidable onslaught upon the inspired inerrancy of the Pentateuch. It called attention to scores of transparent imbecilities … including a dozen or more palpable geographical and historical impossibilities … The answer of constituted authorities was to suppress the "Tractatus", but enough copies got out to reach the proper persons, and ever since then the Old Testament has been under searching and devastating examination.
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Baruch Spinoza 210
Dutch philosopher 1632–1677Related quotes

Part XV - General corollary
The Natural History of Religion (1757)
Context: The whole is a riddle, an aenigma, an inexplicable mystery. Doubt, uncertainty, suspence of judgment appear the only result of our most accurate scrutiny, concerning this subject. But such is the frailty of human reason, and such the irresistible contagion of opinion, that even this deliberate doubt could scarcely be upheld; did we not enlarge our view, and opposing one species of superstition to another, set them a quarrelling; while we ourselves, during their fury and contention, happily make our escape, into the calm, though obscure, regions of philosophy.

“We do not, and never can, know the twelfth-century woman, or, for that matter, any other woman”
Mont Saint Michel and Chartres (1904)
Context: Eleanor and her daughter Mary and her granddaughter Blanche knew as well as Saint Bernard did, or Saint Francis, what a brute the emancipated man could be; and as though they foresaw the society of the sixteenth and eighteenth centuries, they used every terror they could invent as well as every tenderness they could invoke, to tame the beasts around them. Their charge was of manners, and to teach manners, they made a school which they called their Court of Love, with a code of law to which they gave the name of "courteous love". The decisions of this Court were recorded, like the decisions of a modern Bench, under the names of the great ladies who made them, and were enforced by the ladies of good society for whose guidance they were made. They are worth reading, and anyone who likes may read them to this day, with considerable scepticism about their genuineness. The doubt is only ignorance. We do not, and never can, know the twelfth-century woman, or, for that matter, any other woman, but we do know the literature she created; we know the art she lived in, and the religion she professed. We can collect from them some idea why the Virgin Mary ruled, and what she was taken to be, by the world which worshipped her.

Lloyd George is portrayed as saying this, as George Nathaniel Curzon was making a complaint against Raymond Poincaré in the Turkish TV series, Kurtuluş (1994), but no prior citation of such a statement has yet been found.
Misattributed

“Mathematical Analysis is… the true rational basis of the whole system of our positive knowledge.”
Bk. 1, chap. 1; as cited in: Robert Edouard Moritz. Memorabilia mathematica; or, The philomath's quotation-book https://archive.org/stream/memorabiliamathe00moriiala#page/81/mode/2up, (1914), p. 224
System of positive polity (1852)
Source: The Common Background of Greek and Hebrew Civilizations (1965 [1962]), Ch.VIII Further Observations on the Bible

Mont Saint Michel and Chartres (1904)

Annie Besant: An Autobiography (1893) https://books.google.com/books?id=uBA3AQAAMAAJ, p. 357; 3rd edition (1908) https://books.google.com/books?id=5zNPAQAAMAAJ&pg, p. 357

Fiction, The Call of Cthulhu (1926)
Context: The dream-narratives and cuttings collected by the professor were, of course, strong corroboration; but the rationalism of my mind and the extravagance of the whole subject led me to adopt what I thought the most sensible conclusions. So, after thoroughly studying the manuscript again and correlating the theosophical and anthropological notes with the cult narrative of Legrasse, I made a trip to Providence to see the sculptor and give him the rebuke I thought proper for so boldly imposing upon a learned and aged man.