“The problem with alchemy wasn’t that the alchemists had failed to turn lead into gold—no one could do that. The problem, rather, was that the alchemists had failed uninformatively. As a group, the alchemists were notably reclusive; they typically worked alone, they were secretive about their methods and their results, and they rarely accompanied claims of insight or success with anything that we’d recognize today as documentation, let alone evidence. Alchemical methods were hoarded rather than shared, passed down from master to apprentice, and when the alchemists did describe their experiments, the descriptions were both incomplete and vague. As Boyle himself complained of the alchemists’ publications, “Hermetic Books have such involved Obscuritys that they may justly be compared to Riddles written in Cyphers. For after a Man has surmounted the difficulty of decyphering the Words & Terms, he finds a new & greater difficulty to discover the meaning of the seemingly plain Expression.””

in Robert Halleux, ‘The Reception of Arabic Alchemy in the West', in Encyclopaedia of the History of Arabic Science, vol. 3, pp. 896-7

Source: Dictionary of Burning Words of Brilliant Writers (1895), p. 367.

Source: Understanding International Conflicts: An Introduction to Theory and History (6th ed., 2006), Chapter 4, The Failure of Collective Security and World War II, p. 111.

Source: Bloodlines

Preface of M. Quetelet
A Treatise on Man and the Development of His Faculties (1842)
Context: In every instance, it is not my method that is defective; proper observations alone fail me. But will it be ever impossible to have them perfectly precise? I believe that even at present we have them sufficiently so to enter, at least, on the great problem under consideration. Name them as you will, the actions which society stamps as crimes, and of which it punishes the authors, are reproduced every year, in almost exactly the same numbers; examined more closely, they are found to divide themselves into almost exactly the same categories; and, if their number were sufficiently large, we might carry farther our distinctions and subdivisions, and should always find there the same regularity. It will then remain correct to say, that a given species of actions is more common at one given age than at any other given age.

The Rubaiyat (1120)

Source: The Ultimate Hitchhiker's Guide to the Galaxy