Chapter XV: Philosophy Out of Germany (2)

All knowledge is limited to the relative, and consists in increasing generalization: the apex of this pyramid is formed by philosophy. Common knowledge is un-unified knowledge; science is partially unified knowledge; philosophy, which combines the highest generalizations of the sciences into a supreme one, is completely unified knowledge. The data of philosophy are--besides an Unknowable Power--the existence of knowable likenesses and differences among its manifestations, and a resulting segregation of the manifestations into those of subject and object. Further, derivative data are space (relations of coexistence), time (relations of irreversible sequence), matter (coexistent positions that offer resistance), motion (which involves space, time, and matter), and force, the ultimate of ultimates, on which all others depend, and from our primordial experiences of which all the other modes of consciousness are derivable. Similarly the ultimate primary truth is the _persistence of force_, from which, besides the indestructibility of matter and the continuity of (actual or potential) motion, still further truths may be deduced: the persistence of relations among forces or the uniformity of law, the transformation and equivalence of (mental and social as well as of physical) forces, the law of the direction of motion (along the line of least resistance, or the line of greatest traction, or their resultant), and the unceasing rhythm of motion. Beyond these analytic truths, however, philosophy demands a law of universal synthesis. This must be the law of _the continuous redistribution of matter and motion_, for each single thing, and the whole universe as well, is involved in a (continuously repeated) double process of _evolution_ and _dissolution_, the former consisting in the integration of matter[1] and the dissipation of motion, the latter in the absorption of motion and the disintegration of matter. The law of evolution, in its complete development, then runs: "Evolution is an integration of matter and concomitant dissipation of motion; during which the matter passes from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity; and during which the retained motion undergoes a parallel transformation." This is inductively supported by illustrations from every region of nature and all departments of mental and social life; and, further, shown deducible from the ultimate principle of the persistence of force, through the mediation of several corollaries to it, viz., the instability of the homogeneous under the varied incidence of surrounding forces, the multiplication of effects by action and reaction, and segregation. Finally the principle of equilibration indicates the impassable limit at which evolution passes over into dissolution, until the eternal round is again begun. If it may be said of Hegel himself, that he vainly endeavored to master the concrete fullness of reality with formal concepts, the criticism is applicable to Spencer in still greater measure. The barren schemata of concentration, passage into heterogeneity, adaptation, etc., which are taken from natural science, and which are insufficient even in their own field, prove entirely impotent for the mastery of the complex and peculiar phenomena of spiritual life.

[Footnote 1: Organic growth is the concentration of elements before diffused; cf. the union of nomadic families into settled tribes.]

Armed with these principles, however, Mr. Spencer advances to the discussion of the several divisions of "Special Philosophy." Passing over inorganic nature, he finds his task in the interpretation of the phenomena of life, mind, and society in terms of matter, motion, and force under the general evolution formula. This procedure, however, must not be understood as in any wise materialistic. Such an interpretation would be a misrepresentation, it is urged, for the strict relativity of the standpoint limits all conclusions to phenomena, and permits no inference concerning the nature of the "Unknowable." The _Principles of Biology_ take up the phenomena of life. Life is defined as the "continuous adjustment of internal relations to external relations." No attempt is made to explain its origin, yet (in the words of Mr. Sully) it is clear that the lowest forms of life are regarded as continuous in their essential nature with sub-vital processes. The evolution of living organisms, from the lowest to the highest, with the development of all their parts and functions, results from the co-operation of various factors, external and internal, whose action is ultimately reducible to the universal law.

The field of _psychology_ is intimately allied with biology, and yet istinguished from it. Mental life is a subdivision of life in general, and may be subsumed under the general definition; but while biological truths concern the connection between internal phenomena, with but tacit or occasional recognition of the environment, psychology has to do neither with the internal connection nor the external connection, but "the connection between these two connections." Psychology in its subjective aspect, again, is a field entirely _sui generis_. The substance of mind, conceived as the underlying substratum of mental states, is unknowable; but the character of those states of which mind, as we know it, is composed, is a legitimate subject of inquiry. If this be carefully investigated, it seems highly probable that the ultimate unit of consciousness is something "of the same order as that which we call a nervous shock." Mind is proximately composed of feelings and the relations between feelings; from these, revived, associated, and integrated, the whole fabric of consciousness is built up. There is, then, no sharp distinction between the several phases of mind. If we trace its development objectively, in terms of the correspondence between inner and outer phenomena, we find a gradual progress from the less to the more complex, from the lower to the higher, without a break. Reflex action, instinct, memory, reason, are simply stages in the process. All is dependent on experience. Even the forms of knowledge, which are _a priori_ to the individual, are the product of experience in the race, integrated and transmitted by heredity, and become organic in the nervous structure. In general the correspondence of inner and outer in which mental life consists is mediated by the nervous organism. The structure and functions of this condition consciousness and furnish the basis for the interpretation of mental evolution in terms of "evolution at large, regarded as a process of physical transformation." Nevertheless mental phenomena and bodily phenomena are not identical, consciousness is not motion. They are both phenomenal modes of the unknowable, disparate in themselves, and giving no indication of the ultimate nature of the absolute. Subjective analysis of human consciousness yields further proof of the unity of mental composition. All mental action is ultimately reducible to "the continuous differentiation and integration of states of consciousness." The criterion of truth is the inconceivability of the negation. Tried by this test, as by all others, realism is superior to idealism, though in that "transfigured" form which implies objective existence without implying the possibility of any further knowledge concerning it,--hence in a form entirely congruous with the conclusion reached by many other routes.

_Sociology_ deals with super-organic evolution, which involves the co-ordinated actions of many individuals. To understand the social unit, we must study primitive man, especially the ideas which he forms of himself, of other beings, and of the surrounding world. The conception of a mind or other-self is gradually evolved through observation of natural phenomena which favor the notion of duality, especially the phenomena of sleep, dreams, swoons, and death. Belief in the influence of these doubles of the dead on the fortunes of the living leads to sorcery, prayer, and praise. Ancestor-worship is the ultimate source of all forms of religion; to it can be traced even such aberrant developments as fetichism and idolatry, animal-, plant-, and nature-worship. Thus the primitive man feels himself related not only to his living fellows, but to multitudes of supernatural beings about him. The fear of the living becomes the root of the political, and the fear of the dead the root of the religious, control. A society is an organic entity. Though differing from an individual organism in many ways, it yet resembles it in the permanent relations among its component parts. The Domestic Relations, by which the maintenance of the species is now secured, have come from various earlier and less developed forms; the militant type of society is accompanied by a lower, the industrial type by a higher stage of this development. Ceremonial observance is the most primitive kind of government, and the kind from which the political and religious governments have differentiated. Political organization is necessary in order to co-operation for ends which benefit the society directly, and the individual only indirectly. The ultimate political force is the feeling of the community, including as its largest part ancestral feeling. Many facts combine to obscure this truth, but however much it may be obscured, public feeling remains the primal source of authority. The various forms and instruments of government have grown up through processes in harmony with the general law. The two antithetical types of society are the militant and the industrial--the former implies compulsory co-operation under more or less despotic rule, with governmental assumption of functions belonging to the individual and a minimizing of individual initiative; in the latter, government is reduced to a minimum and best conducted by representative agencies, public organizations are largely replaced by private organizations, the individual is freer and looks less to the state for protection and for aid. The fundamental conditions of the highest social development is the cessation of war. The ideas and sentiments at the basis of Ecclesiastical Institutions have been naturally derived from the ghost-theory already described. The goal of religious development is the final rejection of all anthropomorphic conceptions of the First Cause, until the harmony of religion and science shall be reached in the veneration of the Unknowable. The remaining parts of Mr. Spencer's Sociology will treat of Professional Institutions, Industrial Institutions, Linguistic Progress, Intellectual, Moral, and Aesthetic Progress.

The subject matter of _ethics_ is the conduct termed good or bad. Conduct is the adjustment of acts to ends. The evolution of conduct is marked by increasing perfection in the adjustment of acts to the furtherance of individual life, the life of offspring, and social life. The ascription of ethical character to the highly evolved conduct of man in relation to these ends implies the fundamental assumption, that "life is good or bad according as it does, or does not, bring a surplus of agreeable feeling." The ideal of moral science is rational deduction: a rational utilitarianism can be attained only by the recognition of the necessary laws--physical, biological, psychological, and sociological--which condition the results of actions; among these the biological laws have been largely neglected in the past, though they are of the utmost importance as furnishing the link between life and happiness. The "psychological view," again, explains the origin of conscience. In the course of development man comes to recognize the superiority of the higher and more representative feelings as guides to action; this form of self-restraint, however, is characteristic of the non-moral restraints as well, of the political, social, and religious controls. From these the moral control proper has emerged--differing from them in that it refers to intrinsic instead of extrinsic effects--and the element of coerciveness in them, transferred, has generated the feeling of moral compulsion (which, however, "will diminish as fast as moralization increases").

Such a rational ethics, based on the laws which condition welfare rather than on a direct estimation of happiness, and premising the relativity of all pains and pleasures, escapes fundamental objections to the earlier hedonism (_e.g._, those to the hedonic calculus); and, combining the valuable elements in the divergent ethical theories, yields satisfactory principles for the decision of ethical problems. Egoism takes precedence of altruism; yet it is in turn dependent on this, and the two, on due consideration, are seen to be co-essential. Entirely divorced from the other, neither is legitimate, and a compromise is the only possibility; while in the future advancing evolution will bring the two into complete harmony. The goal of the whole process will be the ideal man in the ideal society, the scientific anticipation of which, absolute ethics, promises guidance for the relative and imperfect ethics of the transition period.

Examination of the actual, not the professed, ideas and sentiments of men reveals wide variation in moral judgments. This is especially true of the "pro-ethical" consciousnesses of external authorities, coercions, and opinions--religious, political, and social--by which the mass of mankind are governed; and is broadly due to variation in social conditions. Where the need of external co-operation predominates the ethics of enmity develops; where internal, peaceful co-operation is the chief social need the ethics of amity results: and the evolution principle enables us to infer that, as among certain small tribes in the past, so in the great cultivated nations of the future, the life of amity will unqualifiedly prevail. The Ethics of Individual Life shows the application of moral judgments to all actions which affect individual welfare. The very fact that some deviations from normal life are now morally disapproved, implies the existence of both egoistic and altruistic sanctions for the moral approval of all acts which conduce to normal living and the disapproval of all minor deviations, though for the most part these have hitherto remained unconsidered. Doubtless, however, moral control must here be somewhat indefinite; and even scientific observation and analysis must leave the production of a perfectly regulated conduct to "the organic adjustment of constitution to [social] conditions."

The Ethics of Social Life includes justice and beneficence. Human justice emerges from sub-human or animal justice, whose law (passing over gratis benefits to offspring) is "that each individual shall receive the benefits and evils of its own nature and its consequent conduct." This is the law of human justice, also, but here it is more limited than before by the non-interference which gregariousness requires, and by the increasing need for the sacrifice of individuals for the good of the species. The egoistic sentiment of justice arises from resistance to interference with free action; the altruistic develops through sympathy under social conditions, these being maintained meanwhile by a "pro-altruistic" sentiment, into which dread of retaliation, of social reprobation, of legal punishment, and of divine vengeance enter as component parts. The idea of justice emerges gradually from the sentiment of justice: it has two elements, one brute or positive, with inequality as its ideal, one human or negative, the ideal of which is equality. In early times the former of these was unduly appreciated, as in later times the latter, the true conception includes both, the idea of equality being applied to the limits and the idea of inequality to the benefits of action. Thus the formula of justice becomes: "Every man is free to do that which he wills, provided he infringes not the equal freedom of any other man "--a law which finds its authority in the facts, that it is an _a priori_ dictum of "consciousness after it has been subject to the discipline of prolonged social life," and that it is also deducible from the conditions of the maintenance of life at large and of social life. From this law follow various particular corollaries or rights, all of which coincide with ordinary ethical concepts and have legal enactments corresponding to them. Political rights so-called do not exist; government is simply a system of appliances for the maintenance of private rights. Both the nature of the state and its constitution are variable: the militant type requires centralization and a coercive constitution; the industrial type implies a wider distribution of political power, but requires a representation of interests rather than a representation of individuals. Government develops as a result of war, and its function of protection against internal aggression arises by differentiation from its primary function of external defense. These two, then, constitute the essential duties of the state; when war ceases the first falls away, and its sole function becomes the maintenance of the conditions under which each individual may "gain the fullest life compatible with the fullest life of fellow-citizens." All beyond this, all interference with this life of the individual, whether by way of assistance, restraint, or education, proves in the end both unjust and impolitic. The remaining parts of the _Ethics_ will treat of Negative and Positive Beneficence.

If J.S. Mill and Spencer (the latter of whom, moreover, had announced evolution as a world-law before the appearance of Darwin), move in a direction akin to positivism, the same is true, further, of G.H. Lewes (1817-78; _History of Philosophy_, 5th ed., 1880; _Problems of Life and Mind_, 1874 _seq_).

Turning to the discussion of particular disciplines, we may mention as prominent among English logicians,[1] besides Hamilton, Whewell, and Mill, Whately, Mansel, Thomson, De Morgan, Boole (_An Investigation of the Laws of Thought_, 1854); W.S. Jevons (_The Principles of Science_, 2d ed., 1877); Venn (_Symbolic Logic_, 1881; _Empirical Logic_, 1889), Bradley, and Bosanquet. Among more recent investigators in the field of psychology we may name Carpenter, Ferrier, Maudsley, Galton, Ward, and Sully (_The Human Mind_, 1892), and in the field of comparative psychology, Lubbock, Romanes (_Mental Evolution in Animals_, 1883; _Mental Evolution in Man_, 1889), and Morgan (_Animal Life and Intelligence_, 1891). Among ethical writers the following, besides Spencer and Green, hold a foremost place: H. Sidgwick _(The Methods of Ethics_, 4th ed., 1890), Leslie Stephen _(The Science of Ethics_, 1882), and James Martineau _(Types of Ethical Theory_, 3d ed., 1891). The quarterly review _Mind_ (vols. i.-xvi. 1876-91, edited by G. Croom Robertson; new series from 1892, edited by G.F. Stout) has since its foundation played an important part in the development of English thought.

[Footnote 1: Cf. Nedich, _Die Lehre von der Quantifikation des Prädikats_ in vol. iii. of Wundt's _Philosophische Studien_; L. Liard, _Les Logiciens Anglais Contemporains_, 1878; Al. Riehl in vol. i. of the _Vierteljahrsschrift für wissenschaftliche Philosophie_, 1877 [cf. also appendix A to the English translation of Ueberweg's _Logic_.--TR.].]

German idealism, for which S.T. Coleridge (died 1834) and Thomas Carlyle (died 1881) endeavored to secure an entrance into England, for a long time gained ground there but slowly. Later years, however, have brought increasing interest in German speculation, and much of recent thinking shows the influence of Kantian and Hegelian principles. As pioneer of this movement we may name J.H. Stirling _(The Secret of Hegel_, 1865); and as its most prominent representatives John Caird _(An Introduction to the Philosophy of Religion_, 1880), Edward Caird _(The Critical Philosophy of Immanuel Kant_, 1889; _The Evolution of Religion_, 1893), both in Glasgow, and T.H. Green (1836-82; professor at Oxford; _Prolegomena to Ethics_, 3d ed., 1887; _Works_, edited by Nettleship, 3 vols., 1885-88).[1] In opposition to the hereditary empiricism of English philosophy--which appears in Spencer and Lewes, as it did in Locke, Berkeley, and Hume, though in somewhat altered form--Green maintains that all experience is constituted by intelligible relations. Knowledge, therefore, is possible only for a correlating self-consciousness; while nature, as a system of relations, is likewise dependent on a spiritual principle, of which it is the expression. Thus the central conception of Green's philosophy becomes, "that the universe is a single eternal activity or energy, of which it is the essence to be self-conscious, that is, to be itself and not itself in one" (Nettleship). To this universal consciousness we are related as manifestations or "communications" under the limitations of our physical organization. As such we are free, that is, self-determined, determined by nothing from without. The moral ideal is self-realization or perfection, the progressive reproduction of the divine self-consciousness. This is possible only in terms of a development of persons, for as a self-conscious personality the divine spirit can reproduce itself in persons alone; and, since "social life is to personality what language is to thought," the realization of the moral ideal implies life in common. The nearer determination of the ideal is to be sought in the manifestations of the eternal spirit as they have been given in the moral history of individuals and nations. This shows what has already been implied in the relation of morality to personality and society, that moral good must first of all be a common good, one in which the permanent well-being of self includes the well-being of others also. This is the germ of morality, the development of which yields, first, a gradual extension of the area of common good, and secondly, a fuller and more concrete determination of its content. Further representatives of this movement are W. Wallace, Adamson, Bradley; A. Seth is an ex-member.

[Footnote 1: Cf. on Green the Memoir by Nettleship in vol. iii. of the _Works_.]

The first and greatest of American philosophical thinkers was the Calvinistic theologian Jonathan Edwards (1703-58; treatise on the _Freedom of Will_, 1754; _Works_, 10 vols., edited by Dwight, 1830). Edwards's deterministic doctrine found numerous adherents (among them his son, who bore his father's name, died 1801) as well as strenuous opponents (Tappan, Whedon, Hazard among later names), and essentially contributed to the development of philosophical thought in the United States. For a considerable period this crystallized for the most part around elements derived from British thinkers, especially from Locke and the Scottish School. In 1829 James Marsh called attention to German speculation [1] by his American edition of Coleridge's _Aids to Reflection_, with an important introduction from his own hand. Later W.E. Channing (1780-1842), the head of the Unitarian movement, attracted many young and brilliant minds, the most noted of whom, Ralph Waldo Emerson (1803-82), became a leader among the New England transcendentalists. Metaphysical idealism has, perhaps, met with less resistance in America than in England. Kant and Hegel have been eagerly studied (G.S. Morris, died 1889; C.C. Everett; J. Watson in Canada; Josiah Royce, _The Spirit of Modern Philosophy_, 1892; and others); and _The Journal of Speculative Philosophy_, edited by W.T. Harris, has since 1867 furnished a rallying point for idealistic interests. The influence of Lotze has also been considerable (B.P. Bowne in Boston). Sympathy with German speculation, however, has not destroyed the naturally close connection with the work of writers who use the English tongue. Thus Spencer's writings have had a wide currency, and his system numbers many disciples, though these are less numerous among students of philosophy by profession (John Fiske, _Outlines of Cosmic Philosophy_, 1874).

[Footnote 1: Cf. Porter, _op. cit._]

In the latest decades the broadening of the national life, the increasing acquaintance with foreign thought, and the rapid development of university work have greatly enlarged and deepened the interest in philosophical pursuits. This is manifested most clearly in the field of psychology, including especially the "new" or "physiological" psychology, and the history of philosophy, though indications of pregnant thought in other departments, as ethics and the philosophy of religion, and even of independent construction, are not wanting. Among psychologists of the day we may mention G.S. Hall, editor of _The American Journal of Psychology_ (1887 seq.), G.T. Ladd (_Elements of Physiological Psychology_, 1887), and William James (_Principles of Psychology_, 1890). _The International Journal of Ethics_ (Philadelphia, 1890 seq.), edited by S. Burns Weston, is "devoted to the advancement of ethical knowledge and practice"; among the foreign members of its editorial committee are Jodl and Von Gizycki. The weekly journal of popular philosophy, _The Open Court_, published in Chicago, has for its object the reconciliation of religion and science; the quarterly, _The Monist_ (1890 seq.), published by the same company under the direction of Paul Carus (_The Soul of Man_, 1891), the establishment of a monistic view of the world. Several journals, among them the _Educational Review_ (1891 seq., edited by N.M. Butler), point to a growing interest in pedagogical inquiry. _The American Philosophical Review_ (1892 seq., edited by J.G. Schurman, _The Ethical Import of Darwinism_, 1887) is a comprehensive exponent of American philosophic thought.

%4. Sweden, Norway, Denmark, and Holland.%

In _Sweden_ an empirical period represented by Leopold (died 1829) and Th. Thorild (died 1808), and based upon Locke and Rousseau, was followed, after the introduction of Kant by D. Boëthius, 1794, by a drift toward idealism. This was represented in an extreme form by B. Höijer (died 1812), a contemporary and admirer of Fichte, who defended the right of philosophical construction, and more moderately by Christofer Jacob Böstrom (1797-1866), the most important systematic thinker of his country. As predecessors of Böstrom we may mention Biberg (died 1827), E.G. Geijer (died 1846), and S. Grubbe (died 1853), like him professors in Upsala, and of his pupils, S. Ribbing, known in Germany by his peculiar conception of the Platonic doctrine of ideas (German translation, 1863-64), the moralist Sahlin (1877), the historian, of Swedish philosophy[1] (1873 seq.) A. Nyblaeus of Lund, and H. Edfeldt of Upsala, the editor of Böstrom's works (1883).

[Footnote 1: Cf. Höffding, _Die Philosophie in Schweden_ in the _Philosophische Monatshefte_, vol. xv. 1879, p. 193 seq.]

Böstrom's philosophy is a system of self-activity and personalism which recalls Leibnitz and Krause. The absolute or being is characterized as a concrete, systematically articulated, self-conscious unity, which dwells with its entire content in each of its moments, and whose members both bear the character of the whole and are immanent in one another, standing in relations of organic inter-determination. The antithesis between unity and plurality is only apparent, present only for the divisive view of finite consciousness. God is infinite, fully determinate personality (for determination is not limitation), a system of self-dependent living beings, differing in degree, in which we, as to our true being, are eternally and unchangeably contained. Every being is a definite, eternal, and living thought of God; thinking beings with their states and activities alone exist; all that is real is spiritual, personal. Besides this true, suprasensible world of Ideas, which is elevated above space, time, motion, change, and development, and which has not arisen by creation or a process of production, there exists for man, but only for him--man is formally perfect, it is true, but materially imperfect (since he represents the real from a limited standpoint)--a sensuous world of phenomena as the sphere of his activity. To this he himself belongs, and in it he is spontaneously to develop the suprasensible content which is eternally given him (i.e., his true nature), namely, to raise it from the merely potential condition of obscure presentiment to clear, conscious actuality. Freedom is the power to overcome our imperfection by means of our true nature, to realize our suprasensible capacities, to become for ourselves what we are in ourselves (in God). The ethics of Böstrom is distinguished from the Kantian ethics, to which it is related, chiefly by the fact that it seeks to bring sensibility into a more than merely negative relation to reason. Society is an eternal, and also a personal, Idea in God. The most perfect form of government is constitutional monarchy; the ideal goal of history, the establishment of a system of states embracing all mankind.

J. Borelius of Lund is an Hegelian, but differs from the master in regard to the doctrine of the contradiction. The Hegelian philosophy has adherents in _Norway_ also, as G.V. Lyng (died 1884; _System of Fundamental Ideas_), M.J. Monrad (_Tendencies of Modern Thought_, 1874, German translation, 1879), both professors in Christiania, and Monrad's pupil G. Kent (_Hegel's Doctrine of the Nature of Experience_, 1891).

The _Danish_ philosophy of the nineteenth century has been described by Höffding in the second volume of the _Archiv für Geschichte der Philosophie_, 1888. He begins with the representatives of the speculative movement: Steffens (see above), Niels Treschow (1751-1833), Hans Christian Oersted (1777-1851; _Spirit in Nature_, German translation, Munich, 1850-51), and Frederik Christian Sibbern (1785-1872). A change was brought about by the philosophers of religion Sören Kierkegaard (1813-55) and Rasmus Nielsen (1809-84; _Philosophy of Religion_, 1869), who opposed speculative idealism with a strict dualism of knowledge and faith, and were in turn opposed by Georg Brandes (born 1842) and Hans Bröchner (1820-75). Among younger investigators the Copenhagen professors, Harald Höffding[1] (born 1843) and Kristian Kroman[2] (born 1846) stand in the first rank.

[Footnote 1: Höffding: _The Foundations of Human Ethics_, 1876, German translation, 1880; _Outlines of Psychology_, 1882, English translation by Lowndes, 1891, from the German translation, 1887; _Ethics_, 1887, German translation by Bendixen, 1888.]

[Footnote 2: Kroman: _Our Knowledge of Nature_, German translation, 1883; _A Brief Logic and Psychology_, German translation by Bendixen, 1890.]

Land (_Mind_, vol. iii. 1878) and G. von Antal (1888) have written on philosophy in _Holland_. Down to the middle of the nineteenth century the field was occupied by an idealism based upon the ancients, in particular upon Plato: Franz Hemsterhuis (1721-90; _Works_, new ed., 1846-50), and the philologists Wyttenbach and Van Heusde. Then Cornelius Wilhelm Opzoomer[3] (1821-92; professor in Utrecht) brought in a new movement. Opzoomer favors empiricism. He starts from Mill and Comte, but goes beyond them in important points, and assigns faith a field of its own beside knowledge. In opposition to apriorism he seeks to show that experience is capable of yielding universal and necessary truths; that space, time, and causality are received along with the content of thought; that mathematics itself is based upon experience; and that the method of natural science, especially deduction, must be applied to the mental sciences. The philosophy of mind considers man as an individual being, in his connection with others, in relation to a higher being, and in his development; accordingly it divides into psychology (which includes logic, aesthetics, and ethology), sociology, the philosophy of religion, and the philosophy of history. Central to Opzoomer's system is his doctrine of the five sources of knowledge: Sensation, the feeling of pleasure and pain, aesthetic, moral, and religious feeling. If we build on the foundation of the first three alone, we end in materialism; if we leave the last unused, we reach positivism; if we make religious feeling the sole judge of truth, mysticism is the outcome. The criteria of science are utility and progress. These are still wanting in the mental sciences, in which the often answered but never decided questions continually recur, because we have neither derived the principles chosen as the basis of the deduction from an exact knowledge of the phenomena nor tested the results by experience. The causes of this defective condition can only be removed by imitating the study of nature: we must learn that no conclusions can be reached except from facts, and that we are to strive after knowledge of phenomena and their laws alone. We have no right to assume an "essence" of things beside and in addition to phenomena, which reveals itself in them or hides behind them. Pupils of Opzoomer are his successor in his Utrecht chair, Van der Wyck, and Pierson. We may also mention J.P.N. Land, who has done good service in editing the works of Spinoza and of Geulincx, and the philosopher of religion Rauwenhoff (1888).

[Footnote 1: Opzoomer: _The Method of Science_, a Handbook of Logic, German translation by Schwindt, 1852; _Religion_, German translation by Mook, 1869.]

On the system of the Hungarian philosopher Cyrill Horváth (died 1884 at Pesth) see the essay by E. Nemes in the _Zeitschrift für Philosophie_, vol. lxxxviii, 1886. Since 1889 a review, _Problems of Philosophy and Psychology_, has appeared at Moscow in Russian, under the direction of Professor N. von Grot.