WHOEVER looks at the insect world, at flies, aphides, gnats, and innumerable parasites, and even at the infant mammals, must have remarked the extreme content they take in suction, which constitutes the main business of their life. If we go into a library or news-room, we see the same function on a higher plane, performed with like ardor, with equal impatience of interruption, indicating the sweetness of the act. In the highest civilization the book is still the highest delight. He who has once known its satisfactions is provided with a resource against calamity. Like Plato's disciple who has perceived a truth, "he is preserved from harm until another period." In every man's memory, with the hours when life culminated are usually associated certain books which met his views. Of a large and powerful class we might ask with confidence, What is the event they most desire? what gift? What but the book that shall come, which they have sought through all libraries, through all languages, that shall be to their mature eyes what many a tinsel-covered toy pamphlet was to their childhood, and shall speak to the imagination? Our high respect for a well-read man is praise enough of literature. If we encountered a man of rare intellect, we should ask him what books he read. We expect a great man to be a good reader; or in proportion to the spontaneous power should be the assimilating power. And though such are a more difficult and exacting class, they are not less eager. "He that borrows the aid of an equal understanding," said Burke, "doubles his own; he that uses that of a superior elevates his own to the stature of that he contemplates." We prize books, and they prize them most who are themselves wise. Our debt to tradition through reading and conversation is so massive, our protest or private addition so rare and insignificant,--and this commonly on the ground of other reading or hearing,--that, in a large sense, one would say there is no pure originality. All minds quote. Old and new make the warp and woof of every moment. There is no thread that is not a twist of these two strands. By necessity, by proclivity, and by delight, we all quote. We quote not only books and proverbs, but arts, sciences, religion, customs, and laws; nay, we quote temples and houses, tables and chairs by imitation. The Patent-Office Commissioner knows that all machines in use have been invented and re-invented over and over; that the mariner's compass, the boat, the pendulum, glass, movable types, the kaleidoscope, the railway, the power-loom, etc., have been many times found and lost, from Egypt, China, and Pompeii down; and if we have arts which Rome wanted, so also Rome had arts which we have lost; that the invention of yesterday of making wood indestructible by means of vapor of coal-oil or paraffine was suggested by the Egyptian method which has preserved its mummy-cases four thousand years.