Influence of the Eleatic school and the Sophists.

From the material basis speculative philosophy gradually disengaged itself through the labours of the Eleatic school, the controversy as to the primary element receding into insignificance, and being replaced by investigations as to Time, Motion, Space, Thought, Being, God. The general result of these inquiries brought into prominence the suspicion of the untrustworthiness of the senses, the tendency of the whole period being manifested in the hypothesis at last attained, that atoms and space alone exist; and, since the former are mere centres of force, matter is necessarily a phantasm. When, therefore, the Athenians themselves commenced the cultivation of philosophy, it was with full participation in the doubt and uncertainty thus overspreading the whole subject. As Sophists, their action closed this speculative period, for, by a comparison of all the partial sciences thus far known, they arrived at the conclusion that there is no conscience, no good or evil, no philosophy, no religion, no law, no criterion of truth.

Age of faith—its solutions.

But man cannot live without some guiding rule. If his speculations in Nature will yield him nothing on which he may rely, he will seek some other aid. If there be no criterion of truth for him in philosophy, he will lean on implicit, unquestioning faith. If he cannot prove by physical arguments the existence of God, he will, with Socrates, accept that great fact as self evident and needing no demonstration. He will, in like manner, take his stand upon the undeniable advantages of virtue and good morals, defending the doctrine that pleasure should be the object of life—pleasure of that pure kind which flows from a cultivation of ennobling pursuits, or instinctive, as exhibited in the life of brutes. But when he has thus cast aside demonstration as needless for his purposes, and put his reliance in this manner on faith, he has lost the restraining, the guiding principle that can set bounds to his conduct. If he considers, with Socrates, who opens the third age of Greek development—its age of faith—the existence of God as not needing any proof, he may, in like manner, add thereto the existence of matter and ideas. To faith there will be no difficulty in such doctrines as those of Reminiscence, the double immortality Its continuation by Plato, and its end by the Sceptics. of the soul, the actual existence of universals; and, if such faith, unrestrained and unrestricted, be directed to the regulation of personal life, there is nothing to prevent a falling into excess and base egoism. For ethics, in such an application, ends either in the attempt at the procurement of extreme personal sanctity or the obtaining of individual pleasure—the foundation of patriotism is sapped, the sentiment of friendship is destroyed. So it was with the period of Grecian faith inaugurated by Socrates, developed by Plato, and closed by the Sceptics. Antisthenes and Diogenes of Sinope, in their outrages on society and their self-mortifications, show to what end a period of faith, unrestrained by reason, will come; and Epicurus demonstrated its tendency when guided by self.

Thus closes the third period of Greek philosophical development.

Age of Reason—its solutions.

In introducing us to a fourth, Aristotle insists that, though we must rely on reason, Reason itself must submit to be guided by Experience; and Zeno, taking up the same thought, teaches us that we must appeal to the decisions of common sense. He disposes of all doubt respecting the criterion of truth by proclaiming that the distinctness of our sensuous impressions is a sufficient guide. In all this, the essential condition involved is altogether different from that of the speculative ages, and also of the age of faith. Yet, though under the ostensible guidance of reason, the human mind ever seeks to burst through such self-imposed restraints, attempting to ascertain things for which it possesses no suitable data. Even in the age of Aristotle, the age of Reason in Greece, philosophy resumed such questions as those of the creation of the world, the emanation of matter from God, the existence and nature of evil, the immortality, or, alas! it might perhaps be more truly said, judging from its conclusions, the death of the soul, and this even after the Sceptics had, with increased force, denied that we have any criterion of truth, and showed to their own satisfaction that man, at the best, can do nothing but doubt; and, in view of his condition here upon earth, since it has not been permitted him to know what is right and what is wrong, what is true and what is false, his wisest course is to give himself no concern about the matter, but tranquilly sink into a state of complete indifference and quietism.

How uniformly do we see that through such variations of opinion individual man approaches his end. For Greek philosophy, what other prospect was there but decrepitude, with its contempt for the present, its attachment to the past, its distrust of man, its reliance on the mysterious—the unknown? And this imbecility how plainly we witness before the scene finally is closed.

Duration of these ages.

If now we look back upon this career of the Grecian mind, we find that after the legendary prehistoric period—the age of credulity—there came in succession an age of speculative inquiry, an age of faith, an age of reason, an age of decrepitude—the first, the age of credulity, was closed by geographical discovery; the second by the criticism of the Sophists; the third by the doubts of the Sceptics; the fourth, eminently distinguished by the greatness of its results, gradually declined into the fifth, an age of decrepitude, to which the hand of the Roman put an end. In the mental progress of this people we therefore discern the foreshadowing of a course like that of individual life, its epochs answering to Infancy, Childhood Youth, Manhood, Old Age; and which, on a still grander scale, as we shall hereafter find, has been repeated by all Europe in its intellectual development.