No wonder Plato saw that his ideal state would not be realized until kings became philosophers, that is to say—never. Modern dreamers might profit by his wise predictions.
Plato’s doctrine is one of ideas and idealism as contrasted with sensations and sensationalism. It is spiritualism as contrasted with materialism. The higher produces the lower, instead of the lower the higher. It is the doctrine that recognizes the rational order of the world, the transcendent nature of conscious man, and his ethical aim. It places ideals before man, in the attaining of which he comes to realization of his true being. It is a doctrine of rational explanation of man’s existence. As such it has always strongly invited the adherence of philosophers and Christians. The founders of the church regarded Plato as directly inspired or as having derived inspiration from the Hebrew scriptures.
The doctrine of Universals may be taken with allowance, but we may believe that it represents the right side of philosophical thought. It matters not much whether we hold to the view of Plato’s ideas or native truths of the mind developed by experience or the creative activity of the mind in knowing the outer world or the doctrine of participation in the divine nature and divine thought or the power to generalize from the facts of subjective and objective nature, a power above, and not of, material nature—all these views imply man’s spiritual and ideal character. Behind man and behind nature is the same reality. In some sense (not the pantheistic, as commonly understood) both are manifestations of that reality. Hence the power of man to know the world, because it is a rational world, and manifestation answers to manifestation, thought to thought. He who claims that all knowledge is founded in sensation is partly right; for to know the outer realm is to realize the inner and to know, in part, the truth of the Universe.
Subjective ideas, in some form, must be retained in philosophy. Our world, as a world of evolution, is orderly and has a progressive plan; hence, according to all human conception, is the product of ideas worked out through what are called the laws of nature.
Men have always asked what is the use of philosophy, and to-day they repeat the question with emphasis. We appreciate the state of mind that rejoices in consciousness of standing on the solid earth, the courageous patience that works out with guarded induction scientific truth, the honesty that will not substitute hasty conjecture for fact, and the faith that works toward results to be fully realized only in the distant future. But many scientific men are coming to regard biological and psychological sciences as great laboratories for philosophy. We may believe the coming problems will be solved by the coöperation of philosophy and science. Science studies the objective side and philosophy the subjective side of the same reality.
Philosophy has a use as an attempt to satisfy the imperative need of men to ask the meaning of their being. It has a use as forming a rational hypothesis concerning a First Cause, and a Final Aim. It is a ground of belief in ideals. All speculative philosophy has been inspired more or less by Platonism, and has given the world the noblest, most hopeful, useful, and influential systems of ethics. Philosophical training gives the power to view comprehensively, connectedly, and logically any group of facts. It contains the presuppositions of science and of our very existence. The investigator in the forest learns many valuable details; if he ascends the mountains, he views the landscape as a whole, and, as it were, finds himself. Finally philosophy represents the supreme, the spiritual, interests of man and aims at essential truth.
Will it be relegated to the shelves of archæology? The signs of to-day appear to answer no. In the whole history of philosophy, the mind has never been able to rest permanently in any extreme or one-sided position or in any position that is inadequate to explain essential facts of existence. Hence it cannot rest permanently in materialism. A recent writer speaks of the history of philosophy as “preëminently a record of remarkable returns of the human intellect to ancient follies and dreams, long since outgrown and supposed to have been consigned to oblivion.” Well! It is strange indeed if nature has evolved a product whose needs, instincts, and native beliefs are a lie, a product without aim or rational ground for existence. If it is so, then pessimism is our philosophy and annihilation our best solution of the problem of conscious life. Most men are too respectful believers in evolution to ascribe to nature any such satanic irony.
At any rate one likes to take an excursion in this field; he feels benefited by the trip. Men still like to seek the great fountain head of philosophy, and take a dip in the Castalian spring—a mental bath of this sort is a good and useful thing. They like to sit in the shady groves of the Academy and listen to Plato or walk with Aristotle in the environs of the Gymnasium. The mighty minds of the past have marked out the broad outlines of truth; it is our work to fill in, to correct. The ethical conceptions were furnished by the ancients. The modern world has merely made them richer in content and broader in application. The deeper meaning of any philosophy or science is learned by the historic method, which gives us the trend of events.