The new philosophy was that of the three great post-Kantians, Fichte, Schelling and Hegel. With Fichte, all trace of the thing in itself has disappeared and the dominating concept is that of the Ego, that is, of the Spirit, which creates the world by means of the transcendental imagination and recreates it in thought. In Schelling is found the concept of the Absolute, the unity of subject and object, which has, as its instrument, intellectual intuition. In Hegel, there is this same concept, but it has itself as instrument, that is to say, it is truly logical. All three are Kantians, but all three (and especially the last two) are not simply Kantian. They employed elements which Kant ignored or employed timidly, and in particular the mystical tradition and the new tendencies of æsthetic and historical thought. Thus they pass beyond the abstractionism and intellectualism of the Kantian period, and inaugurate the nineteenth century. They are connected ideally with Vico (Hamann was the little German Vico), and they enrich him with the thoughts of Kant. [Sidenote: _The Logic of Hegel. The concrete concept or Idea._] Neglecting the particular differences between these thinkers and the genetic process by which we pass from one to the other, and taking the result of that speculative movement in its most mature form, which is the philosophy of Hegel, we see in it (like a new, securely established society after the frequent changes of a revolution) the establishment of the new doctrine of the concept. Kant's unconsciousness of the consequences of the _a priori_ synthesis had been such that he had not hesitated to affirm that Logic, since the time of Aristotle, had possessed so just and secure a form as not to need to take one single step backward, and to be unable to take one forward.[15] But Hegel insisted that this was rather a sign that that science demanded complete re-elaboration, since an application of two thousand years should have endowed the spirit with a more lofty consciousness of its own thought and of its own essential nature.[16] What was the concept for Hegel? It was not that of the empirical sciences, which consists in a simple general representation and therefore always in something finite; it is barbaric to give the name concepts to intellectual formations, like "blue," "house," or "animal." Nor was it the mathematical concept, which is an arbitrary construction. All the logical rationality that there is in mathematics is what is called irrational. These so-called concepts are the products of the abstract intellect; the true concept is the product of the concrete intellect, or reason. It has therefore nothing to do with the immediate knowledge of the sentimentalists and of the mystics, and with the intuition of the æstheticists; such formulae as these express the necessity for the concept, but give only a negative determination of it. They assert what it is not in relation to the empirical sciences and then misstate what