Having established the unity of philosophy and historiography, and shown that the division between the two has but a literary and didactic value, because it is founded upon the possibility of placing in the foreground of verbal exposition now one and now the other of the two dialectical elements of that unity, it is well to make quite clear what is the true object of the treatises bearing the traditional title of philosophic 'theory' or 'system': to what (in a word) _philosophy can be reduced._
Philosophy, in consequence of the new relation in which it has been placed, cannot of necessity be anything but the _methodological moment of historiography_: a dilucidation of the categories constitutive of historical judgments, or of the concepts that direct historical interpretation. And since historiography has for content the concrete life of the spirit, and this life is life of imagination and of thought, of action and of morality (or of something else, if anything else can be thought of), and in this variety of its forms remains always one, the dilucidation moves in distinguishing between æsthetic and logic, between economic and ethic, uniting and dissolving them all in the philosophy of the spirit. If a philosophical problem shows itself to be altogether sterile for the historical judgment, we have there the proof that such problem is otiose, badly stated, and in reality does not exist. If the solution of a problem--that is to say, of a philosophical proposition--instead of making history more intelligible, leaves it obscure or confounds it with others, or leaps over it and lightly condemns or negates it, we have there the proof that such proposition and the philosophy with which it is connected are arbitrary, though it may preserve interest in other respects, as a manifestation of sentiment or of imagination.
The definition of philosophy as 'methodology' is not at first exempt from doubts, even on the part of one ready to accept in general the tendency that it represents; because philosophy and methodology are terms often contrasted, and a philosophy that leads to a methodology is apt to be tainted with empiricism. But certainly the methodology of which we are here speaking is not at all empirical; indeed, it appears just for the purpose of correcting and taking the place of the empirical methodology of professional historians and of other such specialists in all that greater part of it where it is a true and proper, though defective, attempt toward the philosophical solution of the theoretical problems raised by the study of history, or toward philosophical methodology and philosophy as methodology.