Page:Principlesofpoli00malt.djvu/63



has been said, and perhaps with truth, that the conclusions of Political Economy partake more of the certainty of the stricter sciences than those of most of the other branches of human knowledge. Yet we should fall into a serious error if we were to suppose that any propositions, the practical results of which depend upon the agency of so variable a being as man, and the qualities of so variable a compound as the soil, can ever admit of the same kinds of proof, or lead to the same certain conclusions, as those which relate to figure and number. There are indeed in political economy great general principles, to which exceptions are of the most rare occurrence, and prominent land-marks which may almost always be depended upon as safe guides; but even these, when examined, will be found to resemble in most particulars the great general rules in morals and politics founded upon the known passions and propensities of human nature: and whether we advert to the qualities of man, or of the earth he is destined to cultivate, we shall be compelled to acknowledge, that the science of political economy bears a nearer resemblance to the science of morals and politics than to that of mathematics.