
Letter to Marin Mersenne (1637) as quoted by D. E. Smith & M. L. Latham Tr. The Geometry of René Descartes (1925)
Preface of M. Quetelet
A Treatise on Man and the Development of His Faculties (1842)
Context: Limits... seem to me of two kinds, ordinary or natural, and extraordinary or beyond the natural. The first limits comprise within them the qualities which deviate more or less from the mean, without attracting attention by excess on one side or the other. When the deviations become greater, they constitute the extraordinary class, having itself its limits, on the outer verge of which are things preternatural... We must conceive the same distinctions in the moral world.
Letter to Marin Mersenne (1637) as quoted by D. E. Smith & M. L. Latham Tr. The Geometry of René Descartes (1925)
"Doll Factory, Gun Factory" (1973), essay reprinted in The Maker of Dune : Insights of a Master of Science Fiction (1987), edited by Tim O'Reilly
General sources
The Art of Magic (1891)
Context: No one regards the magician today as other than an ordinary man gifted with no extraordinary powers. The spectators come, not to be impressed with awe, but fully aware that his causes and effects are natural. They come rather as a guessing committee, to spy out the methods with which he mystifies. Hundreds of eyes are upon him. Men with more knowledge of the sciences than he come to trip and expose him, and to baffle their scrutiny is the study of his life. Long years of training and exercise alone will not make a magician. … There must be some natural aptitude for the art; it must be born in a man, and can never be acquired by rule. He must be alert both in body and in mind; cool and calculating to the movement of a muscle under all circumstances; a close student of men and human nature. To these qualifications he must add the rather incongruous quality of a mind turning on contradictions. With a scientific cause he must produce a seemingly opposite effect to that warranted by order and system.
I know of no life requiring such a series of opposite qualities as the magician's. And after the exercise of all these qualities I have named, resulting in the production of the most startling and novel results, the magician has not the satisfaction, like other men, of the enjoyment of his own product. He must be prepared to see it copied by others, or after a short time discovered by the public.
Source: Our Christ : The Revolt of the Mystical Genius (1921), p. 189
Context: Socrates and Christ speak to us everlastingly of mankind. … It belongs to the great, to the greatest men to say how things are with mankind, how they stand in its innerness and which way it is going; it belongs to Socrates and Christ. These absolutely extraordinary, eternally alive people penetrate to the groundless depth of human nature and understand the speech of ordinary people, of those who are scarcely alive from one day to the next.
Source: Myth and Meaning (1978), Chapter 1 : The Meeting of Myth and Science