Viewed freely, the English language is the accretion and growth of every dialect, race, and range of time, and is the culling and composition of all. From this point of view, it stands for Language in the largest sense, and is really the greatest of studies. It involves so much; is indeed a sort of universal absorber, combiner, and conqueror. The scope of its etymologies is the scope not only of man and civilization, but the history of Nature in all departments, and of the organic Universe, brought up to date; for all are comprehended in words, and their backgrounds. This is when words become vitalized, and stand for things, as they unerringly and very soon come to do; in the mind that enters on the study with fitting sprit, grasp, and appreciation.
— Walt Whitman, “Slang in America,” North American Review, November 1855