Returning to and remaining in or moving in the concrete fact, or, rather, making of oneself thought that thinks the fact concretely, we experience the continual formation and the continual progress of our historical thought and also make clear to ourselves the history of historiography, which proceeds in the same manner. And we see how (I limit myself to this, in order not to allow the eye to wander too far) from the days of the Greeks to our own historical understanding has always been enriching and deepening itself, not because abstract causes and transcendental ends of human things have ever been recovered, but only because an ever increasing consciousness of them has been acquired. Politics and morality, religion and philosophy and art, science and culture and economy, have become more complex concepts and at the same time better determined and unified both in themselves and with respect to the whole. Correlatively with this, the histories of these forms of activity have become ever more complex and more firmly united. We know 'the causes' of civilization as little as did the Greeks; and we know as little as they of the god or gods who control the fortunes of humanity. But we know the theory of civilization better than did the Greeks, and, for instance, we know (as they did not know, or did not know with equal clearness and security) that poetry is an eternal form of the theoretic spirit, that regression or decadence is a relative concept, that the world is not divided into ideas and shadows of ideas, or into potencies and acts, that slavery is not a category of the real, but a historical form of economic, and so forth. Thus it no longer occurs to anyone (save to the survivals or fossils, still to be found among us) to write the history of poetry on the principle of the pedagogic ends that the poets are supposed to have had in view: on the contrary, we strive to determine the forms expressive of their sentiments. We are not at all bewildered when we find ourselves before what are called 'decadences,' but we seek out what new and greater thing was being developed by means of their dialectic. We do not consider the work of man to be miserable and illusory, and aspiration and admiration for the skies and for the ascesis joined thereunto and averse to earth as alone worthy of admiration and imitation. We recognize the reality of power in the act, and in the shadows the solidity of the ideas, and on earth heaven. Finally, we do not find that the possibility of social life is lost owing to the disappearance of the system of slavery. Such a disappearance would have been the catastrophe of reality, if slaves were natural to reality--and so forth.