Once more, as I cannot hope to prove, let me expand and illustrate. The sensationalist has staked himself upon the possibility of explaining and justifying knowledge by conceiving it as the grouping and combination of the qualities directly given us in sensation. The special reasons advanced in support of this position are sufficiently technical and remote. But the motive which has kept the sensationalist at work, which animated Hobbes and Locke, Hume and John Stuart Mill, Voltaire and Diderot, was a human not a scholastic one. It was the belief that only in sensation do we get any personal contact with reality, and hence, any genuine guarantee of vital truth. Thought is pale, and remote from the concrete stuff of knowledge and experience. It only formulates and duplicates; it only divides and recombines that fullness of vivid reality got directly and at first hand in sense experience. Reason, compared with sense, is indirect, emasculate, and faded.
Moreover, reason and thought in their very generality seem to lie beyond and outside the individual. In this remoteness, when they claim any final value, they violate the very first principle of the modern consciousness. What is the distinguishing characteristic of modern life, unless it be precisely that the individual shall not simply get, and reason about, truth in the abstract, but shall make it his own in the most intimate and personal way? He has not only to know the truth in the sense of knowing about it, but he must feel it. What is sensation but the answer to this demand for the most individual and intimate contact with reality? Show me a sensationalist and I will show you not only one who believes that he is on the side of concreteness and definiteness, as against washed-out abstractions and misty general notions: but also one who believes that he is identified with the cause of the individual as distinct from that of external authority. We have only to go to our Locke and our Mill to see that opposition to the innate and the a priori was felt to be opposition to the deification of hereditary prejudice and to the reception of ideas without examination or criticism. Personal contact with reality through sensation seemed to be the only safeguard from opinions which, while masquerading in the guise of absolute and eternal truth, were in reality but the prejudices of the past become so ingrained as to insist upon being standards of truth and action.
Positively as well as negatively, the sensationalists have felt themselves to represent the side of progress. In its supposed eternal character, a general notion stands ready made, fixed forever, without reference to time, without the possibility of change or diversity. As distinct from this, the sensation represents the never-failing eruption of the new. It is the novel, the unexpected, that which cannot be reasoned out in eternal formula, but must be hit upon in the ever-changing flow of our experience. It thus represents stimulation, excitation, momentum onwards. It gives a constant protest against the assumption of any theory or belief to possess finality; and it supplies the ever-renewed presentation of material out of which to build up new objects and new laws.
The sensationalist appears to have a good case. He stands for vividness and definiteness against abstraction; for the engagement of the individual in experience as against the remote and general thought about experience; and for progress and for variety against the eternal fixed monotony of the concept. But what says the rationalist? What value has experience, he inquires, if it is simply a chaos of disintegrated and floating débris? What is the worth of personality and individuality when they are reduced to crudity of brute feeling and sheer intensity of impulsive reaction? What is there left in progress that we should desire it, when it has become a mere unregulated flux of transitory sensations, coming and going without reasonable motivation or rational purpose?
Thus the intellectualist has endeavored to frame the structure of knowledge as a well-ordered economy, where reason is sovereign, where the permanent is the standard of reference for the changing, and where the individual may always escape from his own mere individuality and find support and reinforcement in a system of relations that lies outside of and yet gives validity to his own passing states of consciousness. Thus the rationalists hold that we must find in a universal intelligence a source of truth and guarantee of value that is sought in vain in the confused and flowing mass of sensations.
The rationalist, in making the concept or general idea the all-important thing in knowledge, believes himself to be asserting the interests of order as against destructive caprice and the license of momentary whim. He finds that his cause is bound up with that of the discovery of truth as the necessary instrument and method for action. Only by reference to the general and the rational can the individual find perspective, secure direction for his appetites and impulses, and escape from the uncontrolled and ruinous reactions of his own immediate tendency.
The concept, once more, in its very generality, in its elevation above the intensities and conflicts of momentary passions and interests, is the conserver of the experience of the past. It is the wisdom of the past put into capitalized and funded form to enable the individual to get away from the stress and competition of the needs of the passing moment. It marks the difference between barbarism and civilization, between continuity and disintegration, between the sequence of tradition that is the necessity of intelligent thought and action, and the random and confused excitation of the hour.
When we thus consider not the details of the positions of the sensationalist and rationalist, but the motives that have induced them to assume these positions, we discover what is meant in saying that the question is still a practical, a social one, and that the two schools stand for certain one-sided factors of social life. If we have on one side the demand for freedom, for personal initiation into experience, for variety and progress, we have on the other side the demand for general order, for continuous and organized unity, for the conservation of the dearly bought resources of the past. This is what I mean by saying that the sensationalist abstracts in conscious form the position and tendency of the Germanic element in modern civilization, the factor of appetite and impulse, of keen enjoyment and satisfaction, of stimulus and initiative. Just so the rationalist erects into conscious abstraction the principle of the Græco-Roman world, that of control, of system, of order and authority.
That the principles of freedom and order, of past and future, or conservation and progress, of incitement to action and control of that incitation, are correlative, I shall not stop to argue. It may be worth while, however, to point out that exactly the same correlative and mutually implicating connection exists between sensationalism and rationalism, considered as philosophical accounts of the origin and nature of knowledge.
The strength of each school lies in the weakness of its opponent. The more the sensationalist appears to succeed in reducing knowledge to the associations of sensation, the more he creates a demand for thought to introduce background and relationship. The more consistent the sensationalist, the more openly he reveals the sensation in its own nakedness crying aloud for a clothing of value and meaning which must be borrowed from reflective and rational interpretation. On the other hand, the more reason and the system of relations that make up the functioning of reason are magnified, the more is felt the need of sensation to bring reason into some fruitful contact with the materials of experience. Reason must have the stimulus of this contact in order to be incited to its work and to get materials to operate with. The cause, then, why neither school can come to rest in itself is precisely that each abstracts one essential factor of conduct.