But before we enter upon the doctrine of Art which was published in the first great recognized work of this philosophy, it will be necessary to produce here some extracts from a book which was not originally published in England, or in the English language, but one which was brought out here as an exotic, though it is in fact one of the great original works of this school, and one of its boldest and most successful issues; a work in which the new grounds of the actual experience and life of men, are not merely inclosed and propounded for written inquiry, but openly occupied. This is not the place to explain this fact, though the continental relations of this school, and other circumstances already referred to in the life of its founder, will serve to throw some light upon it; but on account of the bolder assertions which the particular form of writing and publication rendered possible in this case, and for the sake also of the more lively exhibition of the art itself which accompanies and illustrates these assertions in this instance, it appears on the whole excusable to commence our study of the special Art for the delivery and tradition of knowledge in those departments which science was then forbidden on pain of death to enter, with that exhibition of it which is contained in this particular work, trusting to the progress of the extracts themselves to apologize to the intelligent reader for any thing which may seem to require explanation in this selection. It is only necessary to premise, that this work is one of the many works of this school, in which a grave, profoundly scientific design is concealed under the disguise of a gay, popular, attractive form of writing, though in this case the audience is from the first to a certain extent select. It has no platform that takes in--as the plays do, with their more glaring attractions and their lower and broader range of inculcation,--the populace. There is no pit in this theatre. It is throughout a book for men of liberal culture; but it is a book for the world, and for men of the world, and not for the cloister merely, and the scholar. But this, too, has its differing grades of readers, from its outer court of lively pastime and brilliant aimless chat to that _esoteric_ chamber, where the abstrusest parts of sciences are waiting for those who will accept the clues, and patiently ascend to them.