But these are all masters, who devise systems and imperatives. Whereas the pupil, seeking in philosophy an answer to his questions, cannot permit himself any liberties and digressions from the universal rules, for the essence and the fundamental problem of any doctrine reduces to the subordination not merely of men's conduct, but of the life of the whole universe to one regulating principle. Individual philosophers have discovered such principles, but to this day they have reached no final agreement among themselves, and this to some extent lightens the burden of those unhappy ones who, having lost the hope of finding help and guidance elsewhere, have turned to philosophy. If there is not in philosophy one universal principle binding upon and acknowledged by all, it means that it is permitted to each man, at least for the meantime, to feel and even to act in his own way. A man may listen to Spinoza, or he may stop his ears. He may kneel before Plato's eternal ideas, or he may give his allegiance to the ever-changing, ever-flowing reality. Finally, he may accept Schopenhauer's pessimism, but nothing on earth can compel him to celibacy on the ground that Schopenhauer successfully laughed at love. Nor is there any necessity at all, in order to win such freedom for one's self, to be armed with the light dialectic of the old Greek philosopher, or with the heavy logic of the poor Dutch Jew, or with the subtle wit of the profound German. Neither is it necessary to dispute them. It is even possible to agree with them all. The room of the world is infinite, and will not only contain all those who lived once and those who are yet to be born, but will give to each one of them all that he can desire: to Plato, the world of ideas, to Spinoza, the one eternal and unchangeable substance, to Schopenhauer, the Nirvana of Buddhism. Each of these, and all the other philosophers, will find what they want in the universe even to the belief, even to the conviction, that theirs are the only true and universal doctrines. But, at the same time, the profane will find suitable worlds for themselves. From the fact that people are cooped up on the earth, and that they must put forth efforts beyond belief to gain each cubit of earth, and even their illusory liberties, it by no means follows that poverty, obscurantism, and despotism must be considered eternal and original principles, and that economical uniformity is the last refuge of man. A plurality of worlds, a plurality of men and gods amid the vast spaces of the vast universe--this is, if I may be forgiven the word, an ideal. It is true it is not built according to the idealists. Yet what a conclusion does it foreshadow! We leave the disputes and arguments of philosophers aside, so soon as we begin to speak of gods. According to the existing beliefs and hypotheses the gods also have always been quarrelling and fighting among themselves. Even in monotheistic religions people