Malthus at one time intended to expound his metaphysical views at greater length.[72] In other words, he meant to write a book in the manner of Price’s essays, half economical and half literary. We need not deeply regret the “particular business,” whatever it was, that nipped this intention in the bud, besides delaying the publication of the essay as we now have it.[73] The metaphysical and theological passages, as they stand, have the look of an episode, though the thought of them is logically enough connected with the tenor of the book. The views of the author on the other world, the punishment of the wicked, and the use of miracles, have, like the philosophy, mainly a personal interest. Adam Smith, in the later edition of his _Moral Sentiments_, had omitted at least one very marked expression of theological opinion (on the Atonement) that had appeared in the first edition,[74] and perhaps his disciple did well to follow suit. At the same time, omission is not recantation, and we get light on an author’s mind and character by discovering any views in which he once professed to believe. A writer who reached absolute truth at a very early stage of study, has patronized Adam Smith[75] by editing his chief work, and honoured the other economists by tabulating their conclusions in an historical introduction. He extends this favour to Malthus. The reasonings of Malthus he finds, though valuable, are not free from error; he has “all but entirely overlooked” the beneficial effects of the principle of population as a stimulus to invention and progress.[76] This charge is refuted by the essay even in its later form; but, placed alongside of the cosmology of the first edition, it seems merely grotesque. Malthus is accused of ignoring the very phenomena which Malthus glorifies as the “final cause” of the principle of population. He thought he had explained not only one of the chief causes of poverty, but one of the chief effects; if Adam Smith had shown the power of labour as a cause of wealth, Malthus thought he had shown the power of poverty as a cause of labour. No doubt the mistake was a common one; and (to say nothing of the encyclopædias and biographical dictionaries) there are few economical text-books which do justice to Malthus in this matter.[77] But one who speaks with authority should not be content with a borrowed knowledge. The same authority tells us that “the work of Mr. Malthus is valuable rather for having awakened public attention to the subject than for its giving anything like a complete view of the department of the science of which it treats.”[78] Malthus for his part lays no claim to infallibility; like most pioneers, he is sure of little beyond his leading principles, and he is never ashamed to change his views.[79] But, if his _Essay on Population_, gradually amended and expanded as it was, to keep pace with the searching criticisms of thirty years, has not reached the heart of the matter, surely there is no profit in