If, however, the above-mentioned dispute is settled as soon as stated, this cannot be said of another, where our position finds itself opposed to a widely diffused and ancient conception of philosophy as the solver of the mystery of the universe, knowledge of ultimate reality, revelation of the world of noumena, which is held to be beyond the world of phenomena, in which we move in ordinary life and in which history also moves. This is not the place to give the history of that idea; but we must at least say this, that its origin is religious or mythological, and that it persisted even among those philosophers who were most successful in directing thought toward our earth as the sole reality, and initiated the new philosophy as methodology of the judgment or of historical knowledge. It persisted in Kant, who admitted it as the limit of his criticism; it persisted in Hegel, who framed his subtle researches in logic and philosophy of the spirit in a sort of mythology of the Idea.
Nevertheless, the diversity of the two conceptions manifested itself in an ever-increasing ratio, finding expression in various formulas of the nineteenth century, such as _psychology against metaphysic,_ a philosophy of _experience and immanence, aprioristic_ against _transcendental_ philosophy, _positivism_ against _idealism_; and although the polemic was as a rule ill conducted, going beyond the mark and ending by unconsciously embracing that very metaphysic, transcendency, and apriority, that very abstract idealism, which it had set out to combat, the sentiment that inspired it was legitimate. And the philosophy of methodology has made it its own, has combated the same adversary with better arms, has certainly insisted upon a psychological view, but a speculative psychological view, immanent in history, but dialectically immanent, differing in this from positivism, that while the latter made necessary the contingent, it made the contingent necessary, thus affirming the right of thought to the hegemony. Such a philosophy is just philosophy as history (and so history as philosophy), and the determination of the philosophical moment in the purely categorical and methodological moment.
The greater vigour of this conception in respect to the opposite, the superiority of philosophy as _methodology_ over philosophy as _metaphysic,_ is shown by the capacity of the former to solve the problems of the latter by criticizing them and pointing out their origin. Metaphysic, on the other hand, is incapable of solving not only the problems of methodology, but even its own problems, without having recourse to the fantastic and arbitrary. Thus questions as to the reality of the external world, of soul-substance, of the unknowable, of dualisms and of antitheses, and so forth, have disappeared in gnoseological doctrines, which have substituted better conceptions for those which we formerly possessed concerning the logic of the sciences, explaining those questions as eternally renascent aspects of the dialectic or phenomenology of knowledge.