"The characters of nature are legible it is true; but they are not plain enough to enable those who run, to read them. We must make use of a cautious, I had almost said, a timorous method of proceeding. We must not attempt to fly, when we can scarcely pretend to creep. In considering any complex matter, we ought to examine every distinct ingredient in the composition, one by one; and reduce every thing to the utmost simplicity; since the condition of our nature binds us to a strict law and very narrow limits." Preface to the Second Edition, p. 4

"The mind of man has naturally a far greater alacrity and satisfaction in tracing resemblances than in searching for differences; because by making resemblances we produce new images, we unite, we create, we enlarge our stock; but in making distinctions we offer no food at all to the...