What Plato demands is thus, in point of fact, already present. But what we call Philosophy, movement in pure thoughts, has to do with form, and this is something peculiar to itself; nevertheless, the form is not responsible if the universal, freedom, law, is not made a principle in a state. Marcus Aurelius is an example of what a philosopher upon a throne could effect; we have, however, only private actions to record of him, and the Roman Empire was made no better by him. Frederick II. was, on the other hand, justly called the philosopher king. He occupied himself with the Wolffian metaphysics and French philosophy and verses, and was thus, according to his times, a philosopher. Philosophy appears to have been an affair of his own particular inclination, and quite distinct from the fact that he was king. But he was also a philosophic king in the sense that he made for himself an entirely universal end, the well-being and good of the state, a guiding principle in his actions and in all his regulations in respect to treaties with other states, and to the rights of individuals at home; these last he entirely subordinated to absolutely universal ends. If, however, later on, procedure of this kind became ordinary custom, the succeeding princes are no longer called philosophers, even if the same principle is present to them, and the government, and especially the institutions, are founded on it. In the Republic, Plato further speaks in a figure of the difference between a condition of philosophic culture and a lack of Philosophy: it is a long comparison which is both striking and brilliant. The idea which he makes use of is as follows:—“Let us think of an underground den like a cave with a long entrance opening to the light. Its inhabitants are chained so that they cannot move their necks, and can see only the back of the cave. Far behind their backs a torch burns above them. In the intervening space there is a raised way and also a low wall; and behind this wall” (towards the light) “there are men who carry and raise above it all manner of statues of men and animals like puppets in a marionette show, sometimes talking to one another meanwhile, and sometimes silent. Those who are chained would see only the shadows which fall on the opposite wall, and they would take them for reality; they would hear, moreover, by means of the echo, what was said by those who moved the figures, and they would think that it was the voice of the shadows. Now if one of the prisoners were released, and compelled to turn his neck so as to see things as they are, he would think that what he saw was an illusive dream, and that the shadows were the reality. And if anyone were to take him out of the prison into the light itself, he would be dazzled by the light and could see nothing; and he would hate the person who brought him to the light, as having taken away what was to him the truth, and prepared only pain and evil in its place.”[16] This kind of myth is in harmony