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 to me, I confess, that the most perfect sincerity, together with the greatest degree of accuracy attainable, founded upon the most comprehensive view of all the circumstances of the case, are necessary to give that credit and circulation to general principles which is so desirable. And no views of temporary advantage, nor, what is more likely to operate, the fear of destroying the simplicity of a general rule, should ever tempt us to deviate from the strict line of truth, or to conceal or overlook any circumstances that may interfere with the universality of the principle.

There is another class of persons who set a very high value upon the received general rules of political economy, as of the most extensive practical use. They have seen the errors of the mercantile system refuted and replaced by a more philosophical and correct view of the subject; and having made themselves masters of the question so far, they seem to be satisfied with what they have got, and do not look with a favorable eye on new and further inquiries, particularly if they do not see at once clearly and distinctly to what beneficial effects they lead.

This indisposition to innovation, even in science, may possibly have its use, by tending to check crude and premature theories; but it is obvious that, if carried too far, it strikes at the root of all improvement. It is impossible to observe the great events of the last twenty-five years in their relation to subjects belonging to political economy, and sit down satisfied with what has been already done in the science. But if the science be manifestly incomplete, and yet of the highest importance, it would surely be most unwise to restrain inquiry, conducted upon just principles, even where the immediate practical utility of it was not visible. In mathematics, chemistry, and every branch of natural philosophy, how many are the inquiries necessary to their improvement and completion, which, taken separately, do not appear to lead to any specifically advantageous purpose! How many useful inventions, and how much valuable and improving know-