# Reason in Common Sense/Chapter XII

CHAPTER XII
FLUX AND CONSTANCY IN HUMAN NATURE
A conception of something called human nature arises not unnaturally on observing the passions of men, passions which under various disguises seem to reappear in all ages and countries. The tendency of Greek philosophy, with its insistence on general concepts, was to define this idea of human nature still further and to encourage the belief that a single and identical essence, present in all men, determined their powers and ideal destiny. Christianity, while it transposed the human ideal and dwelt on the superhuman affinities of man, did not abandon the notion of a specific humanity. On the contrary, such a notion was implied in the Fall and Redemption, in the Sacraments, and in the universal validity of Christian doctrine and precept. For if human nature were not one, there would be no propriety in requiring all men to preserve unanimity in faith or conformity in conduct. Human nature was likewise the entity which the English psychologists set themselves to describe; and Kant was so entirely dominated by the notion of a fixed and universal human nature ​that its constancy, in his opinion, was the source of all natural as well as moral laws. Had he doubted for a moment the stability of human nature, the foundations of his system would have fallen out; the forms of perception and thought would at once have lost their boasted necessity, since to-morrow might dawn upon new categories and a modified a priori intuition of space or time; and the avenue would also have been closed by which man was led, through his unalterable moral sentiments, to assumptions about metaphysical truths.
The force of this long tradition has been broken, however, by two influences of great weight in recent times, the theory of evolution and the revival of pantheism. The first has reintroduced flux into the conception of existence and the second into the conception of values. If natural species are fluid and pass into one another, human nature is merely a name for a group of qualities found by chance in certain tribes of animals, a group to which new qualities are constantly tending to attach themselves while other faculties become extinct, now in whole races, now in sporadic individuals. Human nature is therefore a variable, and its ideal cannot have a greater constancy than the demands to which it gives expression. Nor can the ideal of one man or one age have any authority over another, since the harmony existing in their nature and interests is accidental and each is a ​transitional phase in an indefinite evolution. The crystallisation of moral forces at any moment is consequently to be explained by universal, not by human, laws; the philosopher’s interest cannot be to trace the implications of present and unstable desires, but rather to discover the mechanical law by which these desires have been generated and will be transformed, so that they will change irrevocably both their basis and their objects.
To this picture of physical instability furnished by popular science are to be added the mystical self-denials involved in pantheism. These come to reinforce the doctrine that human nature is a shifting thing with the sentiment that it is a finite and unworthy one: for every determination of being, it is said, has its significance as well as its origin in the infinite continuum of which it is a part. Forms are limitations, and limitations, according to this philosophy, would be defects, so that man’s only goal would be to escape humanity and lose himself in the divine nebula that has produced and must invalidate each of his thoughts and ideals. As there would be but one spirit in the world, and that infinite, so there would be but one ideal and that indiscriminate. The despair which the naturalist’s view of human instability might tend to produce is turned by this mystical initiation into a sort of ecstasy; and the deluge of conformity suddenly submerges that Life of Reason which science seemed to condemn to gradual extinction. ​Reason is a human function. Though the name of reason has been applied to various alleged principles of cosmic life, vital or dialectical, these principles all lack the essence of rationality, in that they are not conscious movements toward satisfaction, not, in other words, moral and beneficent principles at all. Be the instability of human nature what it may, therefore, the instability of reason is not less, since reason is but a function of human nature. However relative and subordinate, in a physical sense, human ideals may be, these ideals remain the only possible moral standards for man, the only tests which he can apply for value or authority in any other quarter. And among unstable and relative ideals none is more relative and unstable than that which transports all value to a universal law, itself indifferent to good and evil, and worships it as a deity. Such an idolatry would indeed be impossible if it were not partial and veiled, arrived at in following out some human interest and clung to by force of moral inertia and the ambiguity of words. In truth mystics do not practise so entire a renunciation of reason as they preach: eternal validity and the capacity to deal with absolute reality are still assumed by them to belong to thought or at least to feeling. Only they overlook in their description of human nature just that faculty which they exercise in their speculation; their map leaves out the ground on which they stand. The rest, which ​they are not identified with for the moment, they proceed to regard de haut en bas and to discredit as a momentary manifestation of universal laws, physical or divine. They forget that this faith in law, this absorption in the blank reality, this enthusiasm for the ultimate thought, are mere human passions like the rest; that they endure them as they might a fever and that the animal instincts are patent on which those spiritual yearnings repose.
This last fact would be nothing against the feelings in question, if they were not made vehicles for absolute revelations. On the contrary, such a relativity in instincts is the source of their importance. In virtue of this relativity they have some basis and function in the world; for did they not repose on human nature they could never express or transform it. Religion and philosophy are not always beneficent or important, but when they are it is precisely because they help to develop human faculty and to enrich human life. To imagine that by means of them we can escape from human nature and survey it from without is an ostrich-like illusion obvious to all but to the victim of it. Such a pretension may cause admiration in the schools, where self-hypnotisation is easy, but in the world it makes its professors ridiculous. For in their eagerness to empty their mind of human prejudices they reduce its rational burden to a minimum, and if they still continue to dogmatise, ​it is sport for the satirist to observe what forgotten accident of language or training has survived the crash of the universe and made the one demonstrable path to Absolute Truth.
Neither the path of abstraction followed by the mystics, nor that of direct and, as it avers, unbiassed observation followed by the naturalists, can lead beyond that region of common experience, traditional feeling, and conventional thought which all minds enter at birth and can elude only at the risk of inward collapse and extinction. The fact that observation involves the senses, and the senses their organs, is one which a naturalist can hardly overlook; and when we add that logical habits, sanctioned by utility, are needed to interpret the data of sense, the humanity of science and all its constructions becomes clearer than day. Superstition itself could not be more human. The path of unbiassed observation is not a path away from conventional life; it is a progress in conventions. It improves human belief by increasing the proportion of two of its ingredients, attentive perception and practical calculus. The whole resulting vision, as it is sustained from moment to moment by present experience and instinct, has no value apart from actual ideals. And if it proves human nature to be unstable, it can build that proof on nothing more stable than human faculty as at the moment it happens to be.
Nor is abstraction a less human process, as if ​by becoming very abstruse indeed we could hope to become divine. Is it not a commonplace of the schools that to form abstract ideas is the prerogative of man’s reason? Is not abstraction a method by which mortal intelligence makes haste? Is it not the makeshift of a mind overloaded with its experience, the trick of an eye that cannot master a profuse and ever-changing world? Shall these diagrams drawn in fancy, this system of signals in thought, be the Absolute Truth dwelling within us? Do we attain reality by making a silhouette of our dreams? If the scientific world be a product of human faculties, the metaphysical world must be doubly so; for the material there given to human understanding is here worked over again by human art. This constitutes the dignity and value of dialectic, that in spite of appearances it is so human; it bears to experience a relation similar to that which the arts bear to the same, where sensible images, selected by the artist’s genius and already coloured by his aesthetic bias, are redyed in the process of reproduction whenever he has a great style, and saturated anew with his mind.
There can be no question, then, of eluding human nature or of conceiving it and its environment in such a way as to stop its operation. We may take up our position in one region of experience or in another, we may, in unconsciousness of the interests and assumptions that support us, criticise the truth or value of results obtained ​elsewhere. Our criticism will be solid in proportion to the solidity of the unnamed convictions that inspire it, that is, in proportion to the deep roots and fruitful ramifications which those convictions may have in human life. Ultimate truth and ultimate value will be reasonably attributed to those ideas and possessions which can give human nature, as it is, the highest satisfaction. We may admit that human nature is variable; but that admission, if justified, will be justified by the satisfaction which it gives human nature to make it. We might even admit that human ideals are vain but only if they were nothing worth for the attainment of the veritable human ideal.
The given constitution of reason, with whatever a dialectical philosophy might elicit from it, obviously determines nothing about the causes that may have brought reason to its present pass or the phases that may have preceded its appearance. Certain notions about physics might no doubt suggest themselves to the moralist, who never can be the whole man; he might suspect, for instance, that the transitive intent of intellect and will pointed to their vital basis. Transcendence in operation might seem appropriate only to a being with a history and with an organism subject to external influences, whose mind should thus come to represent not merely its momentary state but also its constitutive past and its eventual fortunes. Such suggestions, however, would be extraneous to dialectical ​self-knowledge. They would be tentative only, and human nature would be freely admitted to be as variable, as relative, and as transitory as the natural history of the universe might make it.
The error, however, would be profound and the contradiction hopeless if we should deny the ideal authority of human nature because we had discovered its origin and conditions. Nature and evolution, let us say, have brought life to the present form; but this life lives, these organs have determinate functions, and human nature, here and now, in relation to the ideal energies it unfolds, is a fundamental essence, a collection of activities with determinate limits, relations, and ideals. The integration and determinateness of these faculties is the condition for any synthetic operation of reason. As the structure of the steam-engine has varied greatly since its first invention, and its attributions have increased, so the structure of human nature has undoubtedly varied since man first appeared upon the earth; but as in each steam-engine at each moment there must be a limit of mobility, a unity of function and a clear determination of parts and tensions, so in human nature, as found at any time in any man, there is a definite scope by virtue of which alone he can have a reliable memory, a recognisable character, a faculty of connected thought and speech, a social utility, and a moral ideal. On man’s given structure, on his activity hovering about fixed objects, depends the ​possibility of conceiving or testing any truth or making any progress in happiness.
Thinkers of different experience and organisation have pro tanto different logics and different moral laws. There are limits to communication even among beings of the same race, and the faculties and ideals of one intelligence are not transferable without change to any other. If this historic diversity in minds were complete, so that each lived in its own moral world, a science of each of these moral worlds would still be possible provided some inner fixity or constancy existed in its meanings. In every human thought together with an immortal intent there is a mortal and irrecoverable perception: something in it perishes instantly, the part that can be materially preserved being proportionate to the stability or fertility of the organ that produced it. If the function is imitable, the object it terminates in will reappear, and two or more moments, having the same ideal, will utter comparable messages and may perhaps be unanimous. Unanimity in thought involves identity of functions and similarity in organs. These conditions mark off the sphere of rational communication and society; where they fail altogether there is no mutual intelligence, no conversation, no moral solidarity.
The inner authority of reason, however, is no more destroyed because it has limits in physical expression or because irrational things exist, than ​the grammar of a given language is invalidated because other languages do not share it, or because some people break its rules and others are dumb altogether. Innumerable madmen make no difference to the laws of thought, which borrow their authority from the inward intent and cogency of each rational mind. Reason, like beauty, is its own excuse for being. It is useful, indeed, for living well, when to give reason satisfaction is made the measure of good.
The true philosopher, who is not one chiefly by profession, must be prepared to tread the winepress alone. He may indeed flourish like the bay-tree in a grateful environment, but more often he will rather resemble a reed shaken by the wind. Whether starved or fed by the accidents of fortune he must find his essential life in his own ideal. In spiritual life, heteronomy is suicide. That universal soul sometimes spoken of, which is to harmonise and correct individual demands, if it were a will and an intelligence in act, would itself be an individual like the others; while if it possessed no will and no intelligence, such as individuals may have, it would be a physical force or law, a dynamic system without moral authority and with a merely potential or represented existence. For to be actual and self-existent is to be individual. The living mind cannot surrender its rights to any physical power or subordinate itself to any figment of its own art without falling into manifest idolatry. ​Human nature, in the sense in which it is the transcendental foundation of all science and morals, is a functional unity in each man; it is no general or abstract essence, the average of all men’s characters, nor even the complex of the qualities common to all men. It is the entelechy of the living individual, be he typical or singular. That his type should be odd or common is merely a physical accident. If he can know himself by expressing the entelechy of his own nature in the form of a consistent ideal, he is a rational creature after his own kind, even if, like the angels of Saint Thomas, he be the only individual of his species. What the majority of human animals may tend to, or what the past or future variations of a race may be, has nothing to do with determining the ideal of human nature in a living man, or in an ideal society of men bound together by spiritual kinship. Otherwise Plato could not have reasoned well about the republic without adjusting himself to the politics of Buddha or Rousseau, and we should not be able to determine our own morality without making concessions to the cannibals or giving a vote to the ants. Within the field of an anthropology that tests humanity by the skull’s shape, there might be room for any number of independent moralities, and although, as we shall see, there is actually a similar foundation in all human and even in all animal natures, which supports a rudimentary morality common to all, yet a perfect morality is ​not really common to any two men nor to any two phases of the same man’s life.
The distribution of reason, though a subject irrelevant to pure logic or morals, is one naturally interesting to a rational man, for he is concerned to know how far beings exist with a congenial structure and an ideal akin to his own. That circumstance will largely influence his happiness if, being a man, he is a gregarious and sympathetic animal. His moral idealism itself will crave support from others, if not to give it direction, at least to give it warmth and courage. The best part of wealth is to have worthy heirs, and mind can be transmitted only to a kindred mind. Hostile natures cannot be brought together by mutual invective nor harmonised by the brute destruction and disappearance of either party. But when one or both parties have actually disappeared, and the combat has ceased for lack of combatants, natures not hostile to one another can fill the vacant place. In proportion to their inbred unanimity these will cultivate a similar ideal and rejoice together in its embodiment.
This has happened to some extent in the whole world, on account of natural conditions which limit the forms of life possible in one region; for nature is intolerant in her laxity and punishes too great originality and heresy with death. Such moral integration has occurred very markedly in every good race and society whose members, by adapting themselves to ​the same external forces, have created and discovered their common soul. Spiritual unity is a natural product. There are those who see a great mystery in the presence of eternal values and impersonal ideals in a moving and animal world, and think to solve that dualism, as they call it, by denying that nature can have spiritual functions or spirit a natural cause; but nothing can be simpler if we make, as we should, existence the test of possibility. Ab esse ad posse valet illatio. Nature is a perfect garden of ideals, and passion is the perpetual and fertile soil for poetry, myth, and speculation. Nor is this origin merely imputed to ideals by a late and cynical observer: it is manifest in the ideals themselves, by their subject matter and intent. For what are ideals about, what do they idealise, except natural existence and natural passions? That would be a miserable and superfluous ideal indeed that was nobody’s ideal of nothing. The pertinence of ideals binds them to nature, and it is only the worst and flimsiest ideals, the ideals of a sick soul, that elude nature’s limits and belie her potentialities. Ideals are forerunners or heralds of nature’s successes, not always followed, indeed, by their fulfilment, for nature is but nature and has to feel her way; but they are an earnest, at least, of an achieved organisation, an incipient accomplishment, that tends to maintain and root itself in the world.
To speak of nature’s successes is, of course, to ​impute success retroactively; but the expression may be allowed when we consider that the same functional equilibrium which is looked back upon as a good by the soul it serves, first creates individual being and with it creates the possibility of preference and the whole moral world; and it is more than a metaphor to call that achievement a success which has made a sense of success possible and actual. That nature cannot intend or previously esteem those formations which are the condition of value or intention existing at all, is a truth too obvious to demand repetition; but when those formations arise they determine estimation, and fix the direction of preference, so that the evolution which produced them, when looked back upon from the vantage-ground thus gained, cannot help seeming to have been directed toward the good now distinguished and partly attained. For this reason creation is regarded as a work of love, and the power that brought order out of chaos is called intelligence.
These natural formations, tending to generate and realise each its ideal, are, as it were, eddies in the universal flux, produced no less mechanically, doubtless, than the onward current, yet seeming to arrest or to reverse it. Inheritance arrests the flux by repeating a series of phases with a recognisable rhythm; memory reverses it by modifying this rhythm itself by the integration of earlier phases into those that supervene. Inheritance and memory make human ​stability. This stability is relative, being still a mode of flux, and consists fundamentally in repetition. Repetition marks some progress on mere continuity, since it preserves form and disregards time and matter. Inheritance is repetition on a larger scale, not excluding spontaneous variations; while habit and memory are a sort of heredity within the individual, since here an old perception reappears, by way of atavism, in the midst of a forward march. Life is thus enriched and reaction adapted to a wider field; much as a note is enriched by its overtones, and by the tensions, inherited from the preceding notes, which give it a new setting.
Continuity necessary to progress.Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it. In the first stage of life the mind is frivolous and easily distracted; it misses progress by failing in consecutiveness and persistence. This is the condition of children and barbarians, in whom instinct has learned nothing from experience. In a second stage men are docile to events, plastic to new habits and suggestions, yet able to graft them on original instincts, which they thus bring to fuller satisfaction. This is the plane of manhood ​and true progress. Last comes a stage when retentiveness is exhausted and all that happens is at once forgotten; a vain, because unpractical, repetition of the past takes the place of plasticity and fertile readaptation. In a moving world readaptation is the price of longevity. The hard shell, far from protecting the vital principle, condemns it to die down slowly and be gradually chilled; immortality in such a case must have been secured earlier, by giving birth to a generation plastic to the contemporary world and able to retain its lessons. Thus old age is as forgetful as youth, and more incorrigible; it displays the same inattentiveness to conditions; its memory becomes self-repeating and degenerates into an instinctive reaction, like a bird’s chirp.
Not all readaptation, however, is progress, for ideal identity must not be lost. The Latin language did not progress when it passed into Italian. It died. Its amiable heirs may console us for its departure, but do not remove the fact that their parent is extinct. So every individual, nation, and religion has its limit of adaptation; so long as the increment it receives is digestible, so long as the organisation already attained is extended and elaborated without being surrendered, growth goes on; but when the foundation itself shifts, when what is gained at the periphery is lost at the centre, the flux appears again and progress is not real. Thus a succession of generations or languages or ​religions constitutes no progress unless some ideal present at the beginning is transmitted to the end and reaches a better expression there; without this stability at the core no common standard exists and all comparison of value with value must be external and arbitrary. Retentiveness, we must repeat, is the condition of progress.
The variation human nature is open to is not, then, variation in any direction. There are transformations that would destroy it. So long as it endures it must retain all that constitutes it now, all that it has so far gathered and worked into its substance. The genealogy of progress is like that of man, who can never repudiate a single ancestor. It starts, so to speak, from a single point, free as yet to take any direction. When once, however, evolution has taken a single step, say in the direction of vertebrates, that step cannot be retraced without extinction of the species. Such extinction may take place while progress in other lines is continued. All that preceded the forking of the dead and the living branch will be as well represented and as legitimately continued by the surviving radiates as it could have been by the vertebrates that are no more; but the vertebrate ideal is lost for ever, and no more progress is possible along that line.
The future of moral evolution is accordingly infinite, but its character is more and more determinate at every step. Mankind can never, without perishing, surrender its animal ​nature, its need to eat and drink, its sexual method of reproduction, its vision of nature, its faculty of speech, its arts of music, poetry, and building. Particular races cannot subsist if they renounce their savage instincts, but die, like wild animals, in captivity; and particular individuals die when not suffered any longer to retain their memories, their bodies, or even their master passions. Thus human nature survives amid a continual fluctuation of its embodiments. At every step twigs and leaves are thrown out that last but one season; but the underlying stem may have meantime grown stronger and more luxuriant. Whole branches sometimes wither, but others may continue to bloom. Spiritual unity runs, like sap, from the common root to every uttermost flower; but at each forking in the growth the branches part company, and what happens in one is no direct concern of the others. The products of one age and nation may well be unintelligible to another; the elements of humanity common to both may lie lower down. So that the highest things are communicable to the fewest persons, and yet, among these few, are the most perfectly communicable. The more elaborate and determinate a man’s heritage and genius are, the more he has in common with his next of kin, and the more he can transmit and implant in his posterity for ever. Civilisation is cumulative. The farther it goes the intenser it is, substituting articulate interests for animal fumes and for enigmatic passions. Such ​articulate interests can be shared; and the infinite vistas they open up can be pursued for ever with the knowledge that a work long ago begun is being perfected and that an ideal is being embodied which need never be outworn.
So long as external conditions remain constant it is obvious that the greater organisation a being possesses the greater strength he will have. If indeed primary conditions varied, the finer creatures would die first; for their adaptation is more exquisite and the irreversible core of their being much larger relatively; but in a constant environment their equipment makes them irresistible and secures their permanence and multiplication. Now man is a part of nature and her organisation may be regarded as the foundation of his own: the word nature is therefore less equivocal than it seems, for every nature is Nature herself in one of her more specific and better articulated forms. Man therefore represents the universe that sustains him; his existence is a proof that the cosmic equilibrium that fostered his life is a natural equilibrium, capable of being long maintained. Some of the ancients thought it eternal; physics now suggests a different opinion. But even if this equilibrium, by which the stars are kept in their courses and human progress is allowed to proceed, is fundamentally unstable, it shows what relative stability nature may attain. Could this balance be preserved indefinitely, no one knows what wonderful ​adaptations might occur within it, and to what excellence human nature in particular might arrive. Nor is it unlikely that before the cataclysm comes time will be afforded for more improvement than moral philosophy has ever dreamed of. For it is remarkable how inane and unimaginative Utopias have generally been. This possibility is not uninspiring and may help to console those who think the natural conditions of life are not conditions that a good life can be lived in. The possibility of essential progress is bound up with the tragic possibility that progress and human life should some day end together. If the present equilibrium of forces were eternal all adaptations to it would have already taken place and, while no essential catastrophe would need to be dreaded, no essential improvement could be hoped for in all eternity. I am not sure that a humanity such as we know, were it destined to exist for ever, would offer a more exhilarating prospect than a humanity having indefinite elasticity together with a precarious tenure of life. Mortality has its compensations: one is that all evils are transitory, another that better times may come.
Human nature, then, has for its core the substance of nature at large, and is one of its more complex formations. Its determination is progressive. It varies indefinitely in its historic manifestations and fades into what, as a matter of natural history, might no longer be termed human. At each moment it has ​its fixed and determinate entelechy, the ideal of that being’s life, based on his instincts, summed up in his character, brought to a focus in his reflection, and shared by all who have attained or may inherit his organisation. His perceptive and reasoning faculties are parts of human nature, as embodied in him; all objects of belief or desire, with all standards of justice and duty which he can possibly acknowledge, are transcripts of it, conditioned by it, and justifiable only as expressions of its inherent tendencies.
This definition of human nature, clear as it may be in itself and true to the facts, will perhaps hardly make sufficiently plain how the Life of Reason, having a natural basis, has in the ideal world a creative and absolute authority. A more concrete description of human nature may accordingly not come amiss, especially as the important practical question touching the extension of a given moral authority over times and places depends on the degree of kinship found among the creatures inhabiting those regions. To give a general picture of human nature and its rational functions will be the task of the following books. The truth of a description which must be largely historical may not be indifferent to the reader, and I shall study to avoid bias in the presentation, in so far as is compatible with frankness and brevity; yet even if some bias should manifest itself and if the picture were historically false, the rational ​principles we shall be trying to illustrate will not thereby be invalidated. Illustrations might have been sought in some fictitious world, if imagination had not seemed so much less interesting than reality, which besides enforces with unapproachable eloquence the main principle in view, namely, that nature carries its ideal with it and that the progressive organisation of irrational impulses makes a rational life.