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 good deputies, upright ministers, and an honest king. By taste as well as by discretion and lack of confidence in my powers, I was slowly pursuing some commonplace studies in philology, mingled with a little metaphysics, when I suddenly fell upon the greatest problem that ever has occupied philosophical minds: I mean the criterion of certainty.

Those of my readers who are unacquainted with the philosophical terminology will be glad to be told in a few words what this criterion is, which plays so great a part in my work.

The criterion of certainty, according to the philosophers, will be, when discovered, an infallible method of establishing the truth of an opinion, a judgment, a theory, or a system, in nearly the same way as gold is recognized by the touchstone, as iron approaches the magnet, or, better still, as we verify a mathematical operation by applying the proof. Time has hitherto served as a sort of criterion for society. Thus, the primitive men—having observed that they were not all equal in strength, beauty, and labor—judged, and rightly, that certain ones among them were called by nature to the performance of simple and common functions; but they concluded, and this is where their error lay, that these same individuals of duller intellect, more restricted genius, and weaker personality, were predestined to serve the others; that is, to labor while the latter rested, and to have no other will than theirs: and from this idea of a natural subordination among men sprang domesticity, which, voluntarily accepted at first, was imperceptibly converted into horrible slavery. Time, making this error more palpable, has brought about justice. Nations have learned at their own cost that the subjection of man to man is a false idea, an erroneous theory, pernicious alike to master and to slave. And yet such a social system has stood