The Riddle of Philosophy Part 18

have a sensation of the external world when something appears to us as light. What we then really have is a state of our optic nerve. Whatever may happen outside, the optic nerve translates this external event into the sensation of light.

"The sensation is not a process that transmits a quality or a state of an external object to our consciousness but one that transmits a quality, a state of our nerves caused by an external event, to our consciousness. This Johannes Mueller called "the law of specific sense energies." If that is correct, then our observations contain nothing of the external world but only the sum of our own inner conditions. What we perceive has nothing to do with the external world; it is a product of our own organization. We really perceive only what is in us.

Natural scientists of great renown regarded this thought as an irrefutable basis of their world conception. Hermann Helmholtz (1821 94) considered it as the Kantian thought - that all our knowledge had reference only to processes within ourselves, not to things in themselves - translated into the language of natural science (compare Vol. I of this book).

Helmholtz was of the opinion that the world of our sensations supplies us merely with the signs of the physical processes in the world outside.

I have been convinced that it is necessary to formulate the relation between the sensation and its object by declaring the sensation to be merely the sign of the effect of the object. The nature of the sign demands only that the same sign be always given to the same object. Beyond this requirement there is no more similarity necessary between the sensation and its object than between the spoken word and the object that we denote with it. We cannot even call our sense impression pictures, for a picture depicts the same by the same. In a statue we represent one bodily form through another bodily form; in a drawing we express the perspective view of an object by the same perspective in the picture; in a painting we depict color

through color.

Our sensations, therefore, must differ more from the events they represent than pictures differ from the objects they depict. In our sensual world picture we have nothing objective but a completely subjective element, which we ourselves produce under the stimulation of the effects of an external world that never penetrates into us. This mode of conception is supported from another side by the physicist's view of the phenomena of sensation. A sound that we hear draws our attention to a body in the external world, the parts of which are in a certain state of motion. A stretched string vibrates and we hear a tone. The string transmits the vibrations to the air.

They spread and reach our ear; a tone sensation is transmitted to us. The physicist investigates the laws according to which the physical particles outside move while we hear these tones.

He finds that the subjective tone sensation is based on the objective motion of the physical particles. Similar relations are observed by the physicist with respect to the sensations of light. Light is also based on motion, only this motion is not transmitted by the vibrating particles of the air, but by the vibrations of the ether, the thinnest matter that fills the whole s.p.a.ce of the universe. By every light-emitting body, the ether is put into the state of undulatory vibrations that spread and meet the retina of our eye and excite the optic nerve, which then produces the sensation of light within us. What in our world picture appears as light and color is motion outside in s.p.a.ce. Schleiden expresses this view in the following words: The light outside ourselves in nature is motion of the ether. A motion can be slow and fast; it can have this or that direction, but there is obviously no sense in speaking of light or dark, of green or red motion. In short, outside ourselves, outside the beings who have the sensation, there is no such thing as bright and dark, nor are there any colors.

The physicist expels colors and light from the external world because he finds only motion in it. The physiologist feels that he is forced to withdraw them into the soul because he is of the opinion that the nerve indicates only its own state of irritation no matter what might have excited it. The view that is given with these presuppositions is sharply delineated by Hippolyte Taine (1828 93) in his book, Reason. The external perception is, according to his opinion, nothing but hallucination. A person who, under the influence of hallucination, perceives a death skull three steps in front of him, has exactly the same perception as someone who receives the light rays sent out by a real skull. It is the same inner phantom that exists within us no matter whether we are confronted with a real skull or whether we have a hallucination. The only difference between the one perception and the other is that in one case the hand stretched out toward the object will grasp empty air, whereas in the other case it will meet some solid resistance. The sense of touch then supports the sense of sight. But does this support really represent an irrefutable testimony? What is correct for one sense is also valid for the other. The sensations of touch can also turn out to be hallucinations.

The anatomist Henle expresses the same view in his Anthropological Lectures (1876) in the following way: Everything through which we believe to be informed about an external world consists merely of forms of our consciousness for which the external world supplies merely the exciting cause, the stimulus, in the language of the physiologists. The external world has no colors, tones and tastes. What it really contains we learn only indirectly or not at all. How the external world affects a sense, we merely conclude from its behavior toward the other senses. We can, for instance, in the case of a tone, see the vibrations of the tuning fork with our eyes and feel it with our fingers. The nature of certain stimuli,

which reveal themselves only to the one sense, as, for instance, the stimuli of the sense of smell, is still inaccessible to us. The number of the properties of matter depends on the number and on the keenness of the senses. Whoever lacks a sense loses a group of properties without a chance of regaining them. A person who would have an extra sense would have an organ to grasp qualities of which we have no other inkling than the blind man has of color.

If one glances over the physiological literature from the second half of the nineteenth century, one sees that this view of the subjective nature of the world picture of our perceptions has gained increasing acceptance. Time and again one comes across variations of the thought that is expressed by J.

Rosenthal in his General Physiology of Muscles and Nerves (1877). "The sensations that we receive through external impressions are not dependent on the nature of these impressions but on the nature of our nerve cells. We have no sensation of what exerts its effect on our body but only of the processes in our brain."

To what extent our subjective world picture can be said to give us an indication of the objective external world, is expressed by Helmholtz in his Physiological Optics: To ask the question if cinnabar is really red as we see it or if this is only a sense deception is meaningless. A red-blind person will see cinnabar as black or in a dark yellow-gray shade; this is also a correct reaction for the special nature of his eye. He must only know that his eye happens to be different from that of other people. In itself one sensation is neither more nor less correct or incorrect than the other, even if the people who see the red have the great majority on their side. The red color of cinnabar exists only insofar as the majority of men have eyes that are of a similar nature. One can say with exactly the same right that it is a quality of

cinnabar to be black for red-blind people. It is a different question, however, if we maintain that the wave length of light that is reflected by cinnabar has a certain length. This statement, which we can make without reference to the special nature of our eye, is only concerned with the relations of the substance and the various systems of ether waves.

It is apparent that for such a conception all phenomena of the world are divided into two completely separated parts, into a world of motions that is independent of the special nature of our faculty of perception, and a world of subjective states that are there only within the perceiving subjects. This view has been expressed sharply and pointedly by the physiologist, Du Bois-Reymond (1818 96), in his lecture, On the Limits of Natural Science, which he gave at the forty-fifth a.s.sembly of German naturalists and physicians on August 14, 1872 in Leipzig. Natural science is the reduction of processes we perceive in the world to motions of the smallest physical particles of a "dissolution of natural processes into mechanics of atoms," for it is a "psychological fact of experience that, wherever such a dissolution is successful" our need for explanation is for the time being satisfied. Moreover, it is a known fact that our nervous system and our brain are of a material nature. The processes that take place within them can also be only processes of motion. When sound or light waves are transmitted to my sense organs and from there to my brain, they can here also be nothing but motions. I can only say that in my brain a certain process of motion goes on, and I have simultaneously the sensation "red." For if it is meaningless to say of cinnabar that it is red, it is not less meaningless to say of a motion of the brain particles that it is bright or dark, green or red. "Mute and dark in itself, that is to say, without qualities," such is the world according to the view that has been obtained through the natural scientific conception, which . . . knows instead of sound and light only

vibrations of a property-free fundamental matter that now can be weighed and then again is imponderable. . . . The Mosaic word, "And there was light," is physiologically incorrect. Light came into being only when the first red eye spot of the infusoria differentiated for the first time between light and darkness. Without the substance of the optic and auditory sense this world, glowing in colors and resounding around us, would be dark and silent. (Limits of Natural Science.) Through the processes in the substance of our optic and auditory senses a resounding and colorful world is, according to this view, magically called into existence. The dark and silent world is physical; the sounding and colorful one is psychic. Whereby does the latter arise out of the former; how does motion change into sensation? This is where we meet, according to Du Bois-Reymond, one of the "limits of natural science." In our brain and in the external world there are only motions; in our soul, sensations appear. We shall never be able to understand how the one can arise out of the other.

At first sight it appears is if, through the knowledge of material processes in the brain, certain processes and latent abilities can become understandable. I am thinking of our memory, the stream of the a.s.sociation of our thought pictures, the effect of exercise, specific talents and so forth. But a little concentration at this point tells us that this view is an error.

We would only learn something concerning the inner conditions of our mental life that are approximately of the same nature as our sense impressions, but we should learn nothing that would explain how the mental life comes into existence through these conditions. What possible connections can there be between certain motions of certain atoms in my brain, on the one hand, and, on the other, such undeniable and undefinable facts expressed by the words: I feel pain; I am delighted; I taste something sweet, smell the scent of roses, hear the sound of an organ, see red, and also

the certainty that immediately follows from all this, Therefore I am. It is altogether incomprehensible that it should not be a matter of perfect indifference to a number of atoms of carbon, hydrogen, nitrogen, oxygen, etc., what their position is and how they move, how this has been and how it will be.

There is no bridge for our knowledge that leads from motion to sensation. This is the credo of Du Bois-Reymond. From motion in the material world we cannot come into the psychical world of sensations. We know that sensation arises from matter in motion, but we do not know how this is possible. Also, in the world of motion we cannot go beyond motion. For our subjective perceptions we can point at certain forms of motions because we can infer the course of these motions from the process of our perceptions, but we have no conception of what it is that is moving outside in s.p.a.ce. We say that matter moves. We follow its motions as we watch the reactions of our sensations, but as we do not observe the object in motion but only a subjective sign of it, we can never know what matter is. Du Bois-Reymond is of the opinion that we might be able to solve the riddle of sensation if the riddle of matter were disclosed. If we knew what matter is, we should probably also know how it produces sensations, but both riddles are inaccessible to our knowledge. Du Bois- Reymond meant to check those who wanted to go beyond this limit with the words, "Just let them try the only alternative that is left, namely, supra-naturalism, but be sure that science ends where supra-naturalism begins."

The results of modern natural science are two sharply marked opposites. One of them is the current of monism. It gives the impression of penetrating directly from natural science to the most significant problems of world conception. The other declares itself incapable of proceeding any further with the means of natural science than to the insight that to a certain subjective state there is a certain corresponding process of

motion. The representatives of the two currents vehemently oppose each other. Du Bois-Reymond rejected Haeckel's History of Creation as fiction (compare Du Bois-Reymond's speech, Darwin versus Galiani). The ancestral trees that Haeckel constructs on the basis of comparative anatomy, ontogeny and paleontology appear to Du Bois-Reymond to be of "approximately the same value as are the ancestral trees of the Homeric heroes in the eyes of historical criticism."

Haeckel, on the other hand, considers the view of Du Bois- Reymond to be an unscientific dilettantism that must naturally give support to the reactionary world conceptions.

The jubilation of the spiritualists over Du Bois-Reymond's "Limitation Speech" was so much the more resonant and justified, as Du Bois-Reymond had, up to that time, been considered an important representative of the principle of scientific materialism.

What captivates many people in the idea of dividing the world dualistically into external processes of motion and inner, subjective processes of sensation and perception is the possibility of an application of mathematics to the external processes. If one a.s.sumes material particles (atoms) with energies to exist, one can calculate in which way such atoms have to move under the influence of these energies. What is so attractive in astronomy with its methods of strict calculations is carried into the smallest elements. The astronomer determines the motion of the celestial bodies by calculating the laws of the mechanics of the heavens. In the discovery of the planet Neptune we experienced a triumph of the mechanism of the heavens. One can also reduce the motions that take place in the external world when we hear a tone and see a color to laws that govern the motions of the celestial bodies. Possibly one will be able in the future to calculate the motion that goes on in our brain while we form the judgment, two times two is four. The moment when everything that can

be expressed in mathematical formulas has been calculated will be the one in which the world has been explained mathematically. Laplace has given a captivating description of the ideal of such an explanation of the world in his Essai Philosophique sur les Probabilites (1814): A mind that would know for a given moment all forces that activate nature as well as the mutual position of the ent.i.ties of which nature consists would, if its power of comprehension were otherwise sufficient, comprehend in the same formula the motions of the largest celestial body and of the lightest atom.

Nothing would be uncertain for such a mind, and the future as well as the past would be within the scope of its perfect and immediate knowledge. Man's power of reasoning offers, with the perfection that it has given to astronomy, a feeble imitation of such a mind.

Du Bois-Reymond says in connection with these words: As the astronomer predicts the day on which a comet reemerges from the depth of world s.p.a.ce after years in the firmament of heaven, so would this mind read in its calculation the day when the Greek cross will s.h.i.+ne from the mosque of the Hagia Sophia and when England will burn its last coal.

There can be no doubt that even the most perfect mathematical knowledge of a process of motion would not enlighten me with regard to the question of why this motion appears to me as a red color. When one ball hits another, we can explain the direction of the second ball but we cannot in this way determine how a certain motion produces the red color. All we can say is that when a certain motion is given, a certain color is also given. While we can explain, apparently,

as opposed to merely describe, what can be determined through calculation, we cannot go beyond a mere description in anything that defies calculation.

A significant confession was made by Gustav Robert Kirchhoff (1824 87) when, in 1874, he defined the task of mechanics: "It is to describe the motions occurring in nature in the most complete and simple way." Mechanics applies mathematics. Kirchhoff confesses that with the help of mathematics no more can be obtained than a complete and simple description of the processes in nature.

To those personalities who demand of an explanation something essentially more than just a description according to certain points of view, the confession of Kirchhoff could serve as a confirmation of their belief that there are "limits to our knowledge of nature." Referring to Kirchhoff, Du Bois- Reymond praises the wise reserve of the master, who characterizes the task of mechanics as that of describing the motions of the bodies, and places this in contrast to Ernst Haeckel, who "speaks of atom souls."

An important attempt to base his world conception on the idea that all our perceptions are merely the result of our own organization has been made by Friedrich Albert Lange (1828 73) with his History of Materialism (1864). He had the boldness and consistency of thought that does not allow itself to be blocked by any obstacle but follows its fundamental conception to its last conclusion. Lange's strength lay in a forceful character that was expressed in many directions. His was a personality able to take up many things, and he had sufficient ability to carry them out.

One important enterprise was his renewal of Kant's conception that, with the support of modern natural science, we perceive things not as they require it, but as our organization demands it. Lange did not really produce any new conceptions, but he did throw light into given thought worlds that is rare in its brightness. Our organization, our brain, in connection with our senses, produces the world of sensation. I see "blue," or I feel "hardness," because I am organized in this particular way. I combine the sensations into objects. By combining the sensations of "white" and "soft,"

etc., I produce, for instance, the conception of wax. When I follow my sensation with my thoughts, I do not move in the external world. My intellect produces connections within the world of my sensations according to the laws of my reason.

When I saw that the qualities I perceive in a body presuppose a matter with laws of motion, I also do not go outside of myself. I find that I am forced through my organization to add the thoughts of processes of motion to my sensations.

The same mechanism that produces our sensations also produces our conception of matter. Matter, equally, is only a product of my organization, just as color and tone. Even when we speak of things in themselves, we must be clearly aware of the fact that we cannot go beyond our own realm. We are so organized that we cannot possibly go beyond ourselves. Even what lies beyond our realm can be represented to ourselves only through our conception. We become aware of a limit to our world. We argue that there must be something beyond the limit that causes sensations in us. But we can only go as far as to that limit, even the limit we set ourselves because we can go no further. "A fish can swim in water in the pond, not in the earth, but it can hit its head against the bottom and the walls."

In the same way we live within the realm of our conceptions and sensations, but not in the external things. We hit against a limit, however, where we cannot go any further, where we

must say no more than that beyond this is the unknown. All conceptions we produce concerning this unknown are unjustified because we cannot do anything but relate the conceptions we have obtained within ourselves to the unknown. If we wanted to do this, we should be no wiser than a fish that would say, "Here I cannot go any further.

Therefore, I want to go into some other kind of water in which I will try to swim in some other way." But the fact is that the fish can swim only in water and nowhere else.

This is supplemented by another thought that belongs with the first line of reasoning. Lange, as the spirit of an inexorable desire for consistency, linked them together. In what situation am I when I contemplate myself? Am I not as much bound to the laws of my own organization as I am when I consider something else? My eye observes an object. Without an eye there is no color. I believe that there is an object in front of me, but on closer inspection I find that it is my eye, that is to say, I, myself, that produces the object. Now I turn my observation to my eye itself. Can I do this in any other way except by means of my organs? Is not the conception that I obtain of myself also just my idea? The world of the senses is the product of our organization. Our visible organs are like all other parts of the phenomenal world, only pictures of an unknown object. Our real organization remains, therefore, as unknown to us as the objects of the external world. What we have before us is merely the product of both. Affected by an unknown world through an unknown ego, we produce a world of conceptions that is all we have at our disposal.

Lange asks himself the question: Where does a consistent materialism lead? Let all our mental conclusions and sense perceptions be produced by the activity of our brain, which is bound to material conditions, and our sense organs, which are also material. We are then confronted with the necessity of investigating our organism in order to see how it functions,

but we can do this only by means of our organs. No color without an eye, but also no eye without an eye.

The consistently materialistic view is immediately reversed into a consistently idealistic one. There is no break to be a.s.sumed in our nature. We must not attribute some functions of our being to a physical nature and others to a spiritual one, but we are justified to a.s.sume physical conditions for everything, including the mechanism of our thinking, and we should not rest until we have found them. But we are as much justified if we consider as mere pictures of the really existing world, not only the external world as it appears to us, but also the organs with which we apprehend this world. The eye with which we believe we see is itself only a product of our imagination. When we find that our visual pictures are produced by the structure and function of the eye, we must never forget that the eye with all its contrivances - the optic nerve as well as the brain and the structures we may still discover in it as causes of our thinking - are only ideas that, to be sure, form a world that is consistent and interconnected in itself, but merely a world that points beyond itself. . The senses supply us, as Helmholtz says, with the effects of the things, not with faithful pictures, and certainly not with the things themselves. Among these effects are also the senses themselves as well as the brain and the molecular movements a.s.sumed in it. (History of Materialism, 1887.) Lange, therefore, a.s.sumes a world beyond our world that may consist of the things in themselves or that may not even have anything to do with this "thing in itself," since even this concept, which we form at the limit of our own realm, belongs merely to the world of our ideas.

Lange's world conception, then, leads to the opinion that we have only a world of ideas. This world, however, forces us to acknowledge something beyond its own sphere. It also is

completely incapable of disclosing anything about this something. This is the world conception of absolute ignorance, of agnosticism.

It is Lange's conviction that all scientific endeavor that does not limit itself to the evidence of the senses and the logical intellect that combines these elements of evidence must remain fruitless. That the senses and the intellect together, however, do not supply us with anything but a result of our own organization, he accepts as evidently following from his a.n.a.lysis of the origin of knowledge. The world is for him fundamentally a product of the fiction of our senses and of our intellects. Because of this opinion, he never asks the question of truth with regard to the ideas. A truth that could enlighten us about the essence of the world is not recognized by Lange.

He believes he has obtained an open road for the ideas and ideals that are formed by the human mind and that he has accomplished this through the very fact that he no longer feels the need of attributing any truth to the knowledge of the senses and the intellect. Without hesitation he considered everything that went beyond sensual observation and rational combination to be mere fiction. No matter what the idealistic philosophers had thought concerning the nature of facts, for him it belonged to the realm of poetic fiction.

Through this turn that Lange gave to materialism there arose necessarily the question: Why should not the higher imaginative creations be valid if even the senses are creative?

What is the difference between these two kinds of creation? A philosopher who thinks like this must have a reason for admitting certain conceptions that is quite different from the reason that influences a thinker who acknowledges a conception because he thinks it is true. For Lange, this reason is given by the fact that a conception has value for life. For him, the question is not whether or not a conception is true, but whether it is valuable for man. One thing, however, must

be clearly recognized: That I see a rose as red, that I connect the effect with the cause, is something I have in common with all creatures endowed with the power of perception and thinking. My senses and my reason cannot produce any additional values, but if I go beyond the imaginative product of senses and reason, then I am no longer bound to the organization of the whole human species. Schiller, Hegel and every Tom, d.i.c.k and Harry sees a flower in the same way.

What Schiller weaves in poetic imagination around the flower, what Hegel thinks about it, is not imagined by Tom, d.i.c.k and Harry in the same way. But just as Tom, d.i.c.k and Harry are mistaken when they think that the flower is an ent.i.ty existing externally, so Schiller and Hegel would be in error if they took their ideas for anything more than poetic fiction that satisfied their spiritual needs. What is poetically created through the senses and the intellect belongs to the whole human race, and no one in this respect can be different from anybody else.

What goes beyond the creation of the senses and of reason is the concern of the individual. Nevertheless, this imaginative creation of the individual is also granted a value by Lange for the whole human race, provided that the individual creator "who produces it is normal, richly gifted and typical in his mode of thinking, and is, through his force of spirit, qualified to be a leader."

In this way, Lange believes that he can secure for the ideal world its value by declaring that also the so-called real world is a product of poetic creation. Wherever he may look, Lange sees only fiction, beginning with the lowest stage of sense perception where "the individual still appears subject to the general characteristics of the human species, and culminating with the creative power in poetry."

The function of the senses and of the combining intellect, which produce what is reality for us, can be called a lower function if one compares them with the soaring flight of the

spirit in the creative arts. But, in general and in their totality, these functions cannot be cla.s.sified as a princ.i.p.ally different activity of the mind. As little as our reality is a reality according to our heart's desire, it is nevertheless the firm foundation of our whole spiritual existence. The individual grows out of the soil of the species, and the general and necessary process of knowledge forms the only secure foundation for the individual's rise to an esthetic conception of the world. (History of Materialism.) What Lange considers to be the error of the idealistic world conception is not that it goes beyond the world of the senses and the intellect with its ideas, but that it believes it possesses in these ideas more than the individual thinker's poetic fantasy. One should build up for oneself an ideal world, but one should be aware that this ideal world is no more than poetic imagination. If this idealism maintains it is more than that, materialism will rise time and again with the claim: I have the truth; idealism is poetry. Be that so, says Lange: Idealism is poetry, but materialism is also poetry. In idealism the individual is the creator, in materialism, the species. If they both are aware of their natures, everything is in its right place: the science of the senses and the intellect that provide proofs for the whole species, as well as the poetry of ideas with all its conceptions that are produced by the individual and still retain their value for the race.

One thing is certain: Man is in need of an ideal world created by himself as a supplement of reality, and the highest and n.o.blest functions of his spirit are actively combined in such creations. But is this free activity of the spirit to be allowed repeatedly to a.s.sume the deceptive form of a proof- establis.h.i.+ng science? If so, materialism will emerge again and again to destroy the bolder speculations and try to satisfy reason's demand for unity with a minimum of elevation above the real and actually provable. (History of Materialism.)

In Lange's thinking, complete idealism is combined with a complete surrender of truth itself. The world for him is poetry, but a poetry that he does not value any less than he would if he could acknowledge it as reality.

Thus, two currents of a distinctly natural scientific character can be distinguished as abruptly opposing each other in the development of modern world conception: The monistic current in which Haeckel's mode of conception moved, and the dualistic one, the most forceful and consistent defender of which was Friedrich Albert Lange. Monism considers the world that man can observe to be a true reality and has no doubt that a thinking process that depends on observation can also obtain knowledge of essential significance concerning this reality. Monism does not imagine that it is possible to exhaust the fundamental nature of the world with a few boldly thought out formulas. It proceeds as it follows the facts, and forms new ideas in regard to the connections of these facts. It is convinced, however, that these ideas do supply a knowledge of a true reality. The dualistic conception of Lange divides the world into a known and an unknown part. It treats the first part in the same fas.h.i.+on as monism, following the lead of observation and reflective thought, but it believes that nothing at all can be known concerning the true essential core of the world through this observation and through this thought.

Monism believes in the truth of the real and sees the human world of ideas best supported if it is based on the world of observations. In the ideas and ideals that the monist derives from natural existence, he sees something that is fully satisfactory to his feeling and to his moral need. He finds in nature the highest existence, which he does not only want to penetrate with his thinking for the purpose of knowledge, but to which he surrenders with all his knowledge and with all his love.

In Lange's dualism nature is considered to be unfit to satisfy the spirit's highest needs. Lange must a.s.sume a special world of higher poetry for this spirit that leads beyond the results of observation and its corresponding thought. For monism, true knowledge represents a supreme spiritual value, which, because of its truth, grants man also the purest moral and religious pathos. To dualism, knowledge cannot present such a satisfaction. Dualism must measure the value of life by other things, not by the truth it might yield. The ideas are not valuable because they partic.i.p.ate in the truth. They are of value because they serve life in its highest forms. Life is not valued by means of the ideas, but the ideas are appreciated because of their fruitfulness for life. It is not for true knowledge that man strives but for valuable thoughts.

In recognizing the mode of thinking of natural science Friedrich Albert Lange agrees with monism insofar as he denies the uses of all other sources for the knowledge of reality, but he also denies this mode of thinking any possibility to penetrate into the essential of things. In order to make sure that he himself moves on solid ground he curtails the wings of human imagination. What Lange is doing in such an incisive fas.h.i.+on corresponds to an inclination of thought that is deeply ingrained in the development of modern world conception.

This is shown with perfect clarity also in another sphere of thinking of the nineteenth century. This thinking developed, through various stages, viewpoints from which Herbert Spencer (1820 1903) started as he laid the foundations for a dualism in England. Spencer's dualism appeared at approximately the same time as Lange's in Germany, which strove for natural scientific knowledge of the world on the one hand and, on the other, confessed to agnosticism so far as the essence of things is concerned. When Darwin published his work, The Origin of Species, he could praise the natural

scientific mode of thought of Spencer: Mr. Herbert Spencer, in an Essay (1852), has contrasted the theories of the Creation and the Development of organic beings with remarkable skill and force. He argues from the a.n.a.logy of domestic production, from the changes which the embryos of many species undergo, from the difficulty of distinguis.h.i.+ng species and varieties, and from the principle of general gradation that species have been modified; and he attributes the modification to the change of circ.u.mstances.

The author (1855) has also treated Psychology on the principle of the necessary requirement of each mental power and capacity by gradation. (The Origin of Species, Historical Sketch.) Also, other thinkers who followed the method of natural science felt attracted to Spencer because he tried to explain all reality from the inorganic to the psychological in the manner expressed in Darwin's words above. But Spencer also sides with the agnostics, so that Lange is justified when he says, "Herbert Spencer, whose philosophy is closely related to ours, believes in a materialism of the phenomenal world, the relative justification of which, within the realm of natural science, finds its limit in a thought of an unknowable absolute."

It is quite likely that Spencer arrived at his viewpoint from a.s.sumptions similar to those of Lange. He had been preceded in England by thinkers who were guided by a twofold interest.

They wanted to determine what it is that man really possesses with his knowledge, but they also were resolved not to shatter by doubt or reason the essential substance of the world. They were all more or less dominated by the sentiment that Kant described when he said, "I had to suspend knowledge in order to make room for belief." (Compare the first volume of this book.)

The beginning of the development of the world conception of the nineteenth century in England is marked by the figure of Thomas Reid (1710 96). The fundamental conviction of this man can be expressed in Goethe's words as he describes his own activity as a scientist as non-speculative: "In the last a.n.a.lysis it seems to me that my method consists merely m the practical and self-rectifying operations of common sense that dares to practice its function in a higher sphere." (Compare Goethe's Werke, Vol. 38, p. 595 in Kurschner's Deutsche National Literatur.) This common sense does not doubt in any way that it is confronted with real essential things and processes as it contemplates the world. Reid believes that a world conception is viable only if it upholds this basic view of a healthy common sense. Even if one admitted the possibility that our observation could be deceptive and that the true nature of things could be different from the picture that is supplied to us by our senses and our intellect, it would not be necessary to pay any attention to such a possibility. We find our way through life only if we believe in our observation; nothing beyond that is our concern.

In taking this point of view Reid is convinced that he can arrive at really satisfactory truths. He makes no attempt to obtain a conception of things through complicated thought operations but wants to reach his aim by going back to the basic principles that the soul instinctively a.s.sumes.

Instinctively, unconsciously, the soul possesses what is correct, before the attempt is made to illumine the mind's own nature with the torch of consciousness. It knows instinctively what to think in regard to the qualities and processes of the physical world, and it is endowed instinctively with the direction of moral behavior, of a judgment concerning good and evil. Through his reference to the truths innate in "common sense," Reid directs the attention of thought toward an observation of the soul. This tendency toward a

psychological observation becomes a lasting and characteristic trait in the development of the English world conception.

Outstanding personalities within this development are William Hamilton (1788 1856), Henry Mansel (1820 71), William Whewell (1794 1866), John Herschel (1792 1871), James Mill (1773 1836), John Stuart Mill (1806 73), Alexander Bain (1818 1903) and Herbert Spencer (1820 1903). They all place psychology in the center of their world conception.

William Hamilton also recognizes as truth what the soul from the beginning feels inclined to accept as true. With respect to fundamental truths proofs and comprehension ceases. All one can do is observe their emergence at the horizon of our consciousness. In this sense they are incomprehensible. But one of the fundamental manifestations of our consciousness is also that everything in this world depends on something that is unknown to us. We find in this world in which we live only dependent things, but not absolutely independent ones. Such independent things must exist, however. When a dependent thing is found, an independent thing is a.s.sumed. With our thinking we do not enter the independent ent.i.ty. Human knowledge is meant for the dependent and it becomes involved in contradictions if its thoughts, which are well- suited to the dependent, are applied to the independent.

Knowledge, therefore, must withdraw as we approach the entrance toward the independent. Religious belief is here in its place. It is only through his admission that he cannot know anything of the essential core of the world that man can be a moral being. He can accept a G.o.d who causes a moral order in the world. As soon as it has been understood that all logic has exclusively to do with the dependent, not the independent, no logic can destroy this belief in an infinite G.o.d.