For wise men the joys of reading are life's crowning pleasures. Books are our universities, where souls are the professors. Books are the looms that weave rapidly man's inner garments. Books are the levelers--not by lowering the great, but by lifting up the small. A book literally fulfills the story of the Wandering Jew, who sits down by our side and like a familiar friend tells us what he hath seen and heard through twenty centuries of traveling through Europe. Newton's "Principia" means that at last stars and suns have broken into voice. Agassiz's zoölogy causes each youth to be a veritable Noah, to whom it is given to behold all insects and beasts and birds going two by two into the world's great ark. God hath given us four inferior teachers, including travel, occupation, industry, conversation, and four teachers superior, including love, grief, death--but chiefly books. Wisdom and knowledge are derived from sources many and various. Like ancient Thebes, the soul is a city having gates on every side. There is the eye gate, and through it pass friends, a multitude of strangers, the forests, the fields, the marching clouds. There is the ear gate, and therein go trooping all sweet songs, all conversation and eloquence, all laughter with Niobe's woe and grief. There is conversation, and thereby we cross the threshold of another's mind, and wander through the halls of memory and the chambers of imagination. But these faculties are limited. The ear was made for one sweet song, not for a thousand. Conversation is with one friend living, not with Pliny and Pericles. The vision stays upon yonder horizon; but beyond the line where earth and sky do meet are distant lands and historic scenes; beyond are battle-fields all stained with blood; beyond are the Parthenon and the pyramids. So books come in to increase the power of vision. Books cause the arctics and the tropics, the mountains and hills, all the generations with their woes and wars, their achievements for liberty and religion, to pass before the mind for instruction and delight. And when books have made men contemporaneous with Socrates and Cicero, with Emerson and Lowell, when they have made man a citizen of every clime and country, they go on to add advantages still more signal. When the royal messenger brought Newton the announcement of the honor bestowed upon him by the Queen, the astronomer was so busy with his studies relating to the "Principia" that he begrudged his visitor even an hour of his time.