Whose Father Hunts Witches,
Whose Aunt Seeks Wisdom,
and Whose Soul Desires
an Object
It Cannot Name

May I speak candidly, fleshling, one rational creature to another, myself a book and you a reader? Even if the literature of confession leaves you cold, even if you are among those who wish that Rousseau had never bared his soul and Augustine never mislaid his shame, you would do well to lend me a fraction of your life. I am Mathematical Principles of Natural Philosophy, after all—in my native tongue, Philosophiæ Naturalis Principia Mathematica, the Principia for short—not some tenth-grade algebra text or guide to improving your golf swing. Attend my adventures and you may, Dame Fortune willing, begin to look upon the world anew.

Unlike you humans, a book always remembers its moment of conception. My father, the illustrious Isaac Newton, having abandoned his studies at Trinity College to escape the great plague of 1665, was spending the summer at his mother’s farm in Woolsthorpe. An orchard grew beside the house. Staring contemplatively through his bedroom window, Newton watched an apple drop free of its tree, driven by that strange arrangement we have agreed to call gravity. In a leap of intuition, he imagined the apple not simply as falling to the ground but as striving for the very center of the Earth. This fruit, he divined, bore a relationship to its planet analogous to that enjoyed by the moon: gravitation, ergo, was universal—the laws that governed terrestrial acceleration also ruled the heavens. As below, so above. My father never took a woman to his bed, and yet the rush of pleasure he experienced on that sweltering July afternoon easily eclipsed the common run of orgasm.

Twenty-two years later—in midsummer of 1687—I was born. Being a book, a patchwork thing of leather and dreams, ink and inspiration, I have always counted scholars among my friends, poets among my heroes, and glue among my gods. But what am I like in the particular? How is the Principia Mathematica different from all other books? My historical import is beyond debate: I am, quite simply, the single greatest work of science ever written. My practical utility is indisputable. Whatever you may think of Mars probes, moonlandings, orbiting satellites, steam turbines, power looms, the Industrial Revolution, or the Massachusetts Institute of Technology, none of these things is possible without me.But the curious among you also want to know about my psychic essence. You want to know about my soul.

Take me down from your shelf. If you’re like most humans, you’ve accorded me a place of prestige, right next to the Bible, perhaps, or rubbing covers with Homer. Open me. Things start out innocuously enough, with eight turgid but not indigestible definitions concerning mass, acceleration, and force, followed by my father’s three famous laws of motion. Continue turning my pages. Things are getting pretty rough—aren’t they?—propositions proliferating, scholia colliding, lemmas breeding like lab rats. “The centripetal forces of bodies, which by equable motions describe different circles, tend to the centers of the same circles, and are to each other as the squares of the arcs described in equal times divided respectively by the radii of the circles.” Lugubrious, I’ll admit. This isn’t MotherGoose.

But you can’t judge a book by its contents. Just because my father stuffed me with sines, cosines, tangents, and worse, that doesn’t make me a dry or dispassionate fellow. I have always striven to attune myself to the aesthetic side of mathematics. Behold the diagram that illustrates Proposition XLI. Have you ever beheld a more sensual set of lines? Study the figure accompanying Proposition XLVIII. Have arcs and cycloids ever been more beautiful? My father set geometry in motion. He taught parabolas to pirouette and hyperbolas to gavotte. Don’t let all my conventional trigonometric discourse fool you, by the way. Determined to keep his methods a secret, Newton wrote out his discoveries in the mathematics of his day. What’s really afoot here is that amazing tool he invented for calculating the rate of change of a rate of change. Abide with me, fleshling, and I shall teach you to run with the fluxions.

The foregoing is excerpted from The Last Witchfinder by James Morrow. All rights reserved. No part of this book may be used or reproduced without written permission from HarperCollins Publishers, 10 East 53rd Street, New York, NY 10022