objective and impersonal, and thinking which is subjective and personal. In one sense, knowledge is that which we take for granted. It is that which is settled, disposed of, established, under control. What we fully know, we do not need to think about. In common phrase, it is certain, assured. And this does not mean a mere feeling of certainty. It denotes not a sentiment, but a practical attitude, a readiness to act without reserve or quibble. Of course we may be mistaken. What is taken for knowledge—for fact and truth—at a given time may not be such. But everything which is assumed without question, which is taken for granted in our intercourse with one another and nature is what, at the given time, is called knowledge. Thinking on the contrary, starts, as we have seen, from doubt or uncertainty. It marks an inquiring, hunting, searching attitude, instead of one of mastery and possession. Through its critical process true knowledge is revised and extended, and our convictions as to the state of things reorganized. Clearly the last few centuries have been typically a period of revision and reorganization of beliefs. Men did not really throw away all transmitted beliefs concerning the realities of existence, and start afresh upon the basis of their private, exclusive sensations and ideas. They could not have done so if they had wished to, and if it had been possible general imbecility would have been the only outcome. Men set out from what had passed as knowledge, and critically investigated the grounds upon which it rested; they noted exceptions; they used new mechanical appliances to bring to light data inconsistent with what had been believed; they used their imaginations to conceive a world different from that in which their forefathers had put their trust. The work was a piecemeal, a retail, business. One problem was tackled at a time. The net results of all the revisions amounted, however, to a revolution of prior conceptions of the world. What occurred was a reorganization of prior intellectual habitudes, infinitely more efficient than a cutting loose from all connections would have been.
This state of affairs suggests a definition of the role of the individual, or the self, in knowledge; namely, the redirection, or reconstruction of accepted beliefs. Every new idea, every conception of things differing from that authorized by current belief, must have its origin in an individual. New ideas are doubtless always sprouting, but a society governed by custom does not encourage their development. On the contrary, it tends to suppress them, just because they are deviations from what is current. The man who looks at things differently from others is in such a community a suspect character; for him to persist is generally fatal. Even when social censorship of beliefs is not so strict, social conditions may fail to provide the appliances which are requisite if new ideas are to be adequately elaborated; or they may fail to provide any material support and reward to those who entertain them. Hence they remain mere fancies, romantic castles in the air, or aimless speculations. The freedom of observation and imagination involved in the modern scientific revolution were not easily secured; they had to be fought for; many suffered for their intellectual independence. But, upon the whole, modern European society first permitted, and then, in some fields at least, deliberately encouraged the individual reactions which deviate from what custom prescribes. Discovery, research, inquiry in new lines, inventions, finally came to be either the social fashion, or in some degree tolerable. However, as we have already noted, philosophic theories of knowledge were not content to conceive mind in the individual as the pivot upon which reconstruction of beliefs turned, thus maintaining the continuity of the individual with the world of nature and fellow men. They regarded the individual mind as a separate entity, complete in each person, and isolated from nature and hence from other minds. Thus a legitimate intellectual individualism, the attitude of critical revision of former beliefs which is indispensable to progress, was explicitly formulated as a moral and social individualism. When the activities of mind set out from customary beliefs and strive to effect transformations of them which will in turn win general conviction, there is no opposition between the individual and the social. The intellectual variations of the individual in observation, imagination, judgment, and invention are simply the agencies of social progress, just as conformity to habit is the agency of social conservation. But when knowledge is regarded as originating and developing within an individual, the ties which bind the mental life of one to that of his fellows are ignored and denied.
When the social quality of individualized mental operations is denied, it becomes a problem to find connections which will unite an individual with his fellows. Moral individualism is set up by the conscious separation of different centers of life. It has its roots in the notion that the consciousness of each person is wholly private, a self-inclosed continent, intrinsically independent of the ideas, wishes, purposes of everybody else. But when men act, they act in a common and public world. This is the problem to which the theory of isolated and independent conscious minds gave rise: Given feelings, ideas, desires, which have nothing to do with one another, how can actions proceeding from them be controlled in a social or public interest? Given an egoistic consciousness, how can action which has regard for others take place?
Moral philosophies which have started from such premises have developed four typical ways of dealing with the question. (i) One method represents the survival of the older authoritative position, with such concessions and compromises as the progress of events has made absolutely inevitable. The deviations and departures characterizing an individual are still looked upon with suspicion; in principle they are evidences of the disturbances, revolts, and corruptions inhering in an individual apart from external authoritative guidance. In fact, as distinct from principle, intellectual individualism is tolerated in certain technical regions—in subjects like mathematics and physics and astronomy, and in the technical inventions resulting therefrom. But the applicability of a similar method to morals, social, legal, and political matters, is denied. In such matters, dogma is still to be supreme; certain eternal truths made known by revelation, intuition, or the wisdom of our forefathers set unpassable limits to individual observation and speculation. The evils from which society suffers are set down to the efforts of misguided individuals to transgress these boundaries. Between the physical and the moral sciences, lie intermediate sciences of life, where the territory is only grudgingly yielded to freedom of inquiry under the pressure of accomplished fact. Although past history has demonstrated that the possibilities of human good are widened and made more secure by trusting to a responsibility built up within the very process of inquiry, the "authority" theory sets apart a sacred domain of truth which must be protected from the inroads of variation of beliefs. Educationally, emphasis may not be put on eternal truth, but it is put on the authority of book and teacher, and individual variation is discouraged.
(ii) Another method is sometimes termed rationalism or abstract intellectualism. A formal logical faculty is set up in distinction from tradition and history and all concrete subject matter. This faculty of reason is endowed with power to influence conduct directly. Since it deals wholly with general and impersonal forms, when different persons act in accord with logical findings, their activities will be externally consistent. There is no doubt of the services rendered by this philosophy. It was a powerful factor in the negative and dissolving criticism of doctrines having nothing but tradition and class interest behind them; it accustomed men to freedom of discussion and to the notion that beliefs had to be submitted to criteria of reasonableness. It undermined the power of prejudice, superstition, and brute force, by habituating men to reliance upon argument, discussion, and persuasion. It made for clarity and order of exposition. But its influence was greater in destruction of old falsities than in the construction of new ties and associations among men. Its formal and empty nature, due to conceiving reason as something complete in itself apart from subject matter, its hostile attitude toward historical institutions, its disregard of the influence of habit, instinct, and emotion, as operative factors in life, left it impotent in the suggestion of specific aims and methods. Bare logic, however important in arranging and criticizing existing subject matter, cannot spin new subject matter out of itself. In education, the correlative is trust in general ready-made rules and principles to secure agreement, irrespective of seeing to it that the pupil's ideas really agree with one another.
(iii) While this rationalistic philosophy was developing in France, English thought appealed to the intelligent self-interest of individuals in order to secure outer unity in the acts which issued from isolated streams of consciousness. Legal arrangements, especially penal administration, and governmental regulations, were to be such as to prevent the acts which proceeded from regard for one's own private sensations from interfering with the feelings of others. Education was to instill in individuals a sense that non-interference