When we consider the weak and nerveless periods of some literary men, who perchance in feet and inches come up to the standard of their race, and are not deficient in girth also, we are amazed at the immense sacrifice of thews and sinews. What! these proportions, these bones,—and this their work! Hands which could have felled an ox have hewed this fragile matter which would not have tasked a lady's fingers! Can this be a stalwart man's work, who has a marrow in his back and a tendon Achilles in his heel?
Henry David Thoreau (1817–1862), U.S. philosopher, author, naturalist. A Week on the Concord and Merrimack Rivers (1849), in The Writings of Henry David Thoreau, vol. 1, p. 110, Houghton Mifflin (1906).