The healthy and genial nature of the man accounts for his most characteristic excellencies, but this book exhibits much we had not looked for. The lectures on the passions evince a power of comprehending and sympathizing with what is great in the emotional part of human nature for which we were not prepared. The lectures on the conduct of the understanding, and on habit, show that the writer had studied profoundly and successfully the discipline of the mind and character. The lectures on the beautiful are pervaded by a healthy and unaffected appreciation of the loveliness of external nature. And combined with these high qualities, is that incessant play of witty and humorous fancy (perhaps the only certain safeguard against sentimental and systematic excesses, and, when duly restrained by the judgment and moral sense, the best corrective of hasty philosophizing), so peculiar to Sydney Smith. Much of all that we have mentioned is indeed and undoubtedly attributable to the original constitution of Smith's mind; but for much he was also, beyond all question, indebted to the greater freedom of thought and conversation which (as compared with the Scotch) has always characterized literary and social opinion in England. The topics discussed in the lectures naturally resolve themselves into, and are arranged in, three divisions. We have an analysis of the thinking faculties, or the powers of perception, conception, and reasoning; an analysis of the powers of taste, or of what Schiller and other Germans designate the _æsthetical_ part of our nature; and an exposition of the "active powers of the mind," as they are designated in the nomenclature of the school of Reid, the appetites, passions, and will. All these themes are discussed with constant reference to a practical application of the knowledge conveyed. Every thing is treated in subordination to the establishment of rules for the right conduct of the understanding, and the formation of good habits. These practical lessons for the strengthening of the reason, and the regulation of the emotions and imagination, constitute what, in the language of Sydney Smith, and the school to which he belongs, is called "Moral Philosophy." Apart from any particular school, the impression of the author left by the perusal of his lectures is that he was a man of considerable reading in books, but far more deeply read in the minds of those he encountered in society. It is in this extensive knowledge of the world, confirming and maturing the judgments suggested by his wisely-balanced powers of feeling and humor, that the superiority of Smith over the rest of his school consists. He knows men not merely as they are represented in books, but as they actually are; he knows them not only as they exist in a provincial sphere, narrowed by petty interests and trammeled by pedantic opinion, but as they exist in the freest community of the world, where boundless ambition and enterprise find full scope.