Be not dismayed at the vast multitude of books, nor fear that, with your small leisure, you will never be able to master any appreciable share of them. Few and far between are the great books of the world. The works which it is necessary to know, may be comprised in a comparatively small compass. The rest are to be preserved in the great literary conservatories, some as records of the past, others as chronicles of the times, and not a few as models to be avoided. The Congressional Library at Washington is our great National conservatory of books. As the library of the government--that is, of the whole people,--it is inclusive of all the literature which the country produces, while all the other libraries are and must be more or less exclusive. No National Library can ever be too large. In order that the completeness of the collection shall not fail, and to preserve the whole of our literature, it is put into the Statute of Copyright, as a condition precedent of the exclusive right to multiply copies of any book, that it shall be deposited in the Library of Congress. Apprehension is sometimes expressed that our National Library will become overloaded with trash, and so fail of its usefulness. 'Tis a lost fear. There is no act of Congress requiring all the books to be read. The public sense is continually winnowing and sifting the literature of every period, and to books and their authors, every day is the day of judgment. Nowhere in the world is the inexorable law of the survival of the fittest more rigidly applied than in the world of books. The works which are the most frequently re-printed in successive ages are the ones which it is safe to stand by. Books may be divided into three classes: 1st, acquaintances; 2d, friends; and 3d, intimates. It is well enough to have an acquaintance with a multitude of books, as with many people; though in either case much time should not be given to merely pleasant intercourse, that leads to no result. With our literary friends, we can spend more time, for they awaken keen interest, and are to be read with zest, and consequently with profit. But for our chosen intimates, our heart-companions, we reserve our highest regard, and our best hours. Choice and sacred is the book that makes an era in the life of the reader; the book which first rouses his higher nature, and awakens the reason or the imagination. Such a volume will many a one remember; the book which first excited his own thought, made him conscious of untried powers, and opened to his charmed vision a new world.