The chief perplexity, however, which besets this subject and makes discussions of it so often end in a cloud, is quite artificial. Thought is not a mechanical calculus, where the elements and the method exhaust the fact. Thought is a form of life, and should be conceived on the a.n.a.logy of nutrition, generation, and art. Reason, as Hume said with profound truth, is an unintelligible instinct. It could not be otherwise if reason is to remain something transitive and existential; for transition is unintelligible, and yet is the deepest characteristic of existence. Philosophers, however, having perceived that the function of thought is to fix static terms and reveal eternal relations, have inadvertently transferred to the living act what is true only of its ideal object; and they have expected to find in the process, treated psychologically, that luminous deductive clearness which belongs to the ideal world it tends to reveal. The intelligible, however, lies at the periphery of experience, the surd at its core; and intelligence is but one centrifugal ray darting from the slime to the stars. Thought must execute a metamorphosis; and while this is of course mysterious, it is one of those familiar mysteries, like motion and will, which are more natural than dialectical lucidity itself; for dialectic grows cogent by fulfilling intent, but intent or meaning is itself vital and inexplicable.
[Sidenote: Perception c.u.mulative and synthetic]
The process of counting is perhaps as simple an instance as can be found of a mental operation on sensible data. The clock, let us say, strikes two: if the sensorium were perfectly elastic and after receiving the first blow reverted exactly to its previous state, retaining absolutely no trace of that momentary oscillation and no altered habit, then it is certain that a sense for number or a faculty of counting could never arise. The second stroke would be responded to with the same reaction which had met the first. There would be no summation of effects, no complication. However numerous the successive impressions might come to be, each would remain fresh and pure, the last being identical in character with the first. One, one, one, would be the monotonous response for ever. Just so generations of ephemeral insects that succeeded one another without transmitting experience might repeat the same round of impressions--an everlasting progression without a shadow of progress. Such, too, is the idiot"s life: his liquid brain transmits every impulse without resistance and retains the record of no impression.
Intelligence is accordingly conditioned by a modification of both structure and consciousness by dint of past events. To be aware that a second stroke is not itself the first, I must retain something of the old sensation. The first must reverberate still in my ears when the second arrives, so that this second, coming into a consciousness still filled by the first, is a different experience from the first, which fell into a mind perfectly empty and unprepared. Now the newcomer finds in the subsisting One a sponsor to christen it by the name of Two. The first stroke was a simple 1. The second is not simply another 1, a mere iteration of the first. It is 1^{1}, where the coefficient represents the reverberating first stroke, still persisting in the mind, and forming a background and perspective against which the new stroke may be distinguished. The meaning of "two," then, is "this after that" or "this again," where we have a simultaneous sense of two things which have been separately perceived but are identified as similar in their nature.
Repet.i.tion must cease to be pure repet.i.tion and become c.u.mulative before it can give rise to the consciousness of repet.i.tion.
The first condition of counting, then, is that the sensorium should retain something of the first impression while it receives the second, or (to state the corresponding mental fact) that the second sensation should be felt together with a survival of the first from which it is distinguished in point of existence and with which it is identified in point of character.
[Sidenote: No identical agent needed.]
Now, to secure this, it is not enough that the sensorium should be materially continuous, or that a "spiritual substance" or a "transcendental ego" should persist in time to receive the second sensation after having received and registered the first. A perfectly elastic sensorium, a wholly unchanging soul, or a quite absolute ego might remain perfectly identical with itself through various experiences without collating them. It would then remain, in fact, more truly and literally identical than if it were modified somewhat by those successive shocks. Yet a sensorium or a spirit thus unchanged would be incapable of memory, unfit to connect a past perception with one present or to become aware of their relation. It is not ident.i.ty in the substance impressed, but growing complication in the phenomenon presented, that makes possible a sense of diversity and relation between things. The ident.i.ty of substance or spirit, if it were absolute, would indeed prevent comparison, because it would exclude modifications, and it is the survival of past modifications within the present that makes comparisons possible. We may impress any number of forms successively on the same water, and the ident.i.ty of the substance will not help those forms to survive and acc.u.mulate their effects. But if we have a surface that retains our successive stampings we may change the substance from wax to plaster and from plaster to bronze, and the effects of our labour will survive and be superimposed upon one another. It is the actual plastic form in both mind and body, not any unchanging substance or agent, that is efficacious in perpetuating thought and gathering experience.
[Sidenote: Example of the sun.]
Were not Nature and all her parts such models of patience and pertinacity, they never would have succeeded in impressing their existence on something so volatile and irresponsible as thought is. A sensation needs to be violent, like the sun"s blinding light, to arrest attention, and keep it taut, as it were, long enough for the system to acquire a respectful att.i.tude, and grow predisposed to resume it. A repet.i.tion of that sensation will thereafter meet with a prepared response which we call recognition; the concomitants of the old experience will form themselves afresh about the new one and by their convergence give it a sort of welcome and interpretation. The movement, for instance, by which the face was raised toward the heavens was perhaps one element which added to the first sensation, brightness, a concomitant sensation, height; the brightness was not bright merely, but high. Now when the brightness reappears the face will more quickly be lifted up; the place where the brightness shone will be looked for; the brightness will have acquired a claim to be placed somewhere. The heat which at the same moment may have burned the forehead will also be expected and, when felt, projected into the brightness, which will now be hot as well as high. So with whatever other sensations time may a.s.sociate with this group. They will all adhere to the original impression, enriching it with an individuality which will render it before long a familiar complex in experience, and one easy to recognise and to complete in idea.
[Sidenote: His primitive divinity.]
In the case of so vivid a thing as the sun"s brightness many other sensations beside those out of which science draws the qualities attributed to that heavenly body adhere in the primitive mind to the phenomenon. Before he is a substance the sun is a G.o.d. He is beneficent and necessary no less than bright and high; he rises upon all happy opportunities and sets upon all terrors. He is divine, since all life and fruitfulness hang upon his miraculous revolutions. His coming and going are life and death to the world. As the sensations of light and heat are projected upward together to become attributes of his body, so the feelings of pleasure, safety, and hope which he brings into the soul are projected into his spirit; and to this spirit, more than to anything else, energy, independence, and substantiality are originally attributed. The emotions felt in his presence being the ultimate issue and term of his effect in us, the counterpart or shadow of those emotions is regarded as the first and deepest factor in his causality.
It is his divine life, more than aught else, that underlies his apparitions and explains the influences which he propagates. The substance or independent existence attributed to objects is therefore by no means only or primarily a physical notion. What is conceived to support the physical qualities is a pseudo-psychic or vital force. It is a moral and living object that we construct, building it up out of all the materials, emotional, intellectual, and sensuous, which lie at hand in our consciousness to be synthesised into the hybrid reality which we are to fancy confronting us. To discriminate and redistribute those miscellaneous physical and psychical elements, and to divorce the G.o.d from the material sun, is a much later problem, arising at a different and more reflective stage in the Life of Reason.
[Sidenote: Causes and essences contrasted.]
When reflection, turning to the comprehension of a chaotic experience, busies itself about recurrences, when it seeks to normalise in some way things coming and going, and to straighten out the causes of events, that reflection is inevitably turned toward something dynamic and independent, and can have no successful issue except in mechanical science. When on the other hand reflection stops to challenge and question the fleeting object, not so much to prepare for its possible return as to conceive its present nature, this reflection is turned no less unmistakably in the direction of ideas, and will terminate in logic or the morphology of being. We attribute independence to things in order to normalise their recurrence. We attribute essences to them in order to normalise their manifestations or const.i.tution. Independence will ultimately turn out to be an a.s.sumed constancy in material processes, essence an a.s.sumed constancy in ideal meanings or points of reference in discourse. The one marks the systematic distribution of objects, the other their settled character.
[Sidenote: Voracity of intellect.]
We talk of recurrent perceptions, but materially considered no perception recurs. Each recurrence is one of a finite series and holds for ever its place and number in that series. Yet human attention, while it can survey several simultaneous impressions and find them similar, cannot keep them distinct if they grow too numerous. The mind has a native bias and inveterate preference for form and identification. Water does not run down hill more persistently than attention turns experience into constant terms. The several repet.i.tions of one essence given in consciousness will tend at once to be neglected, and only the essence itself--the character shared by those sundry perceptions--will stand and become a term in mental discourse. After a few strokes of the clock, the reiterated impressions merge and cover one another; we lose count and perceive the quality and rhythm but not the number of the sounds. If this is true of so abstract and mathematical a perception as is counting, how emphatically true must it be of continuous and infinitely varied perceptions flowing in from the whole spatial world. Glimpses of the environment follow one another in quick succession, like a regiment of soldiers in uniform; only now and then does the stream take a new turn, catch a new ray of sunlight, or arrest our attention at some break.
The senses in their natural play revert constantly to familiar objects, gaining impressions which differ but slightly from one another. These slight differences are submerged in apperception, so that sensation comes to be not so much an addition of new items to consciousness as a reburnishing there of some imbedded device. Its character and relations are only slightly modified at each fresh rejuvenation. To catch the pa.s.sing phenomenon in all its novelty and idiosyncrasy is a work of artifice and curiosity. Such an exercise does violence to intellectual instinct and involves an aesthetic power of diving bodily into the stream of sensation, having thrown overboard all rational ballast and escaped at once the inertia and the momentum of practical life. Normally every datum of sense is at once devoured by a hungry intellect and digested for the sake of its vital juices. The result is that what ordinarily remains in memory is no representative of particular moments or shocks--though sensation, as in dreams, may be incidentally recreated from within--but rather a logical possession, a sense of acquaintance with a certain field of reality, in a word, a consciousness of _knowledge_.
[Sidenote: Can the transcendent be known?]
But what, we may ask, is this reality, which we boast to know? May not the sceptic justly contend that nothing is so unknown and indeed unknowable as this pretended object of knowledge? The sensations which reason treats so cavalierly were at least something actual while they lasted and made good their momentary claim to our interest; but what is this new ideal figment, unseizable yet ever present, invisible but indispensable, unknowable yet alone interesting or important? Strange that the only possible object or theme of our knowledge should be something we cannot know.
[Sidenote: Can the immediate be meant?]
An answer these doubts will perhaps appear if we ask ourselves what sort of contact with reality would satisfy us, and in what terms we expect or desire to possess the subject-matter of our thoughts. Is it simply corroboration that we look for? Is it a verification of truth in sense?
It would be unreasonable, in that case, after all the evidence we demand has been gathered, to complain that the ideal term thus concurrently suggested, the super-sensible substance, reality, or independent object, does not itself descend into the arena of immediate sensuous presentation. Knowledge is not eating, and we cannot expect to devour and possess _what we mean_. Knowledge is recognition of something absent; it is a salutation, not an embrace. It is an advance on sensation precisely because it is representative. The terms or goals of thought have for their function to subtend long tracts of sensuous experience, to be ideal links between fact and fact, invisible wires behind the scenes, threads along which inference may run in making phenomena intelligible and controllable. An idea that should become an image would cease to be ideal; a principle that is to remain a principle can never become a fact. A G.o.d that you could see with the eyes of the body, a heaven you might climb into by a ladder planted at Bethel, would be parts of this created and interpretable world, not terms in its interpretation nor objects in a spiritual sphere. Now external objects are thought to be principles and sources of experience; they are accordingly conceived realities on an ideal plane. We may look for all the evidence we choose before we declare our inference to be warranted; but we must not ask for something more than evidence, nor expect to know realities without inferring them anew. They are revealed only to understanding. We cannot cease to think and still continue to know.
[Sidenote: Is thought a bridge from sensation to sensation?]
It may be said, however, that principles and external objects are interesting only because they symbolise further sensations, that thought is an expedient of finite minds, and that representation is a ghostly process which we crave to materialise into bodily possession. We may grow sick of inferring truth and long rather to become reality.
Intelligence is after all no compulsory possession; and while some of us would gladly have more of it, others find that they already have too much. The tension of thought distresses them and to represent what they cannot and would not be is not a natural function of their spirit. To such minds experience that should merely corroborate ideas would prolong dissatisfaction. The ideas must be realised; they must pa.s.s into immediacy. If reality (a word employed generally in a eulogistic sense) is to mean this desired immediacy, no ideal of thought can be real. All intelligible objects and the whole universe of mental discourse would then be an unreal and conventional structure, impinging ultimately on sense from which it would derive its sole validity.
There would be no need of quarrelling with such a philosophy, were not its use of words rather misleading. Call experience in its existential and immediate aspect, if you will, the sole reality; that will not prevent reality from having an ideal dimension. The intellectual world will continue to give beauty, meaning, and scope to those bubbles of consciousness on which it is painted. Reality would not be, in that case, what thought aspires to reach. Consciousness is the least ideal of things when reason is taken out of it. Reality would then need thought to give it all those human values of which, in its substance, it would have been wholly deprived; and the ideal would still be what lent music to throbs and significance to being.
[Sidenote: Mens naturaliter platonica.]
The equivocation favoured by such language at once begins to appear. Is not thought with all its products a part of experience? Must not sense, if it be the only reality, be sentient sometimes of the ideal? What the site is to a city that is immediate experience to the universe of discourse. The latter is all held materially within the limits defined by the former; but if immediate experience be the seat of the moral world, the moral world is the only interesting possession of immediate experience. When a waste is built on, however, it is a violent paradox to call it still a waste; and an immediate experience that represents the rest of sentience, with all manner of ideal harmonies read into the whole in the act of representing it, is an immediate experience raised to its highest power: it is the Life of Reason. In vain, then, will a philosophy of intellectual abstention limit so Platonic a term as reality to the immediate aspect of existence, when it is the ideal aspect that endows existence with character and value, together with representative scope and a certain lien upon eternity.
More legitimate, therefore, would be the a.s.sertion that knowledge reaches reality when it touches its ideal goal. Reality is known when, as in mathematics, a stable and unequivocal object is developed by thinking. The locus or material embodiment of such a reality is no longer in view; these questions seem to the logician irrelevant. If necessary ideas find no ill.u.s.tration in sense, he deems the fact an argument against the importance and validity of sensation, not in the least a disproof of his ideal knowledge. If no site be found on earth for the Platonic city, its const.i.tution is none the less recorded and enshrined in heaven; nor is that the only true ideal that has not where to lay its head. What in the sensualistic or mystical system was called reality will now be termed appearance, and what there figured as an imaginary construction borne by the conscious moment will now appear to be a prototype for all existence and an eternal standard for its estimation.
It is this rationalistic or Platonic system (little as most men may suspect the fact) that finds a first expression in ordinary perception.
When you distinguish your sensations from their cause and laugh at the idealist (as this kind of sceptic is called) who says that chairs and tables exist only in your mind, you are treating a figment of reason as a deeper and truer thing than the moments of life whose blind experience that reason has come to illumine. What you call the evidence of sense is pure confidence in reason. You will not be so idiotic as to make no inferences from your sensations; you will not pin your faith so unimaginatively on momentary appearance as to deny that the world exists when you stop thinking about it. You feel that your intellect has wider scope and has discovered many a thing that goes on behind the scenes, many a secret that would escape a stupid and gaping observation. It is the fool that looks to look and stops at the barely visible: you not only look but _see_; for you understand.
[Sidenote: Ident.i.ty and independence predicated of things.]
Now the practical burden of such understanding, if you take the trouble to a.n.a.lyse it, will turn out to be what the sceptic says it is: a.s.surance of eventual sensations. But as these sensations, in memory and expectation, are numerous and indefinitely variable, you are not able to hold them clearly before the mind; indeed, the realisation of all the potentialities which you vaguely feel to lie in the future is a task absolutely beyond imagination. Yet your present impressions, dependent as they are on your chance att.i.tude and disposition and on a thousand trivial accidents, are far from representing adequately all that might be discovered or that is actually known about the object before you.
This object, then, to your apprehension, is not identical with any of the sensations that reveal it, nor is it exhausted by all these sensations when they are added together; yet it contains nothing a.s.signable but what they might conceivably reveal. As it lies in your fancy, then, this object, the reality, is a complex and elusive ent.i.ty, the sum at once and the residuum of all particular impressions which, underlying the present one, have bequeathed to it their surviving linkage in discourse and consequently endowed it with a large part of its present character. With this hybrid object, sensuous in its materials and ideal in its locus, each particular glimpse is compared, and is recognised to be but a glimpse, an aspect which the object presents to a particular observer. Here are two identifications. In the first place various sensations and felt relations, which cannot be kept distinct in the mind, fall together into one term of discourse, represented by a sign, a word, or a more or less complete sensuous image. In the second place the new perception is referred to that ideal ent.i.ty of which it is now called a manifestation and effect.
Such are the primary relations of reality and appearance. A reality is a term of discourse based on a psychic complex of memories, a.s.sociations, and expectations, but const.i.tuted in its ideal independence by the a.s.sertive energy of thought. An appearance is a pa.s.sing sensation, recognised as belonging to that group of which the object itself is the ideal representative, and accordingly regarded as a manifestation of that object.
Thus the notion of an independent and permanent world is an ideal term used to mark and as it were to justify the cohesion in s.p.a.ce and the recurrence in time of recognisable groups of sensations. This coherence and recurrence force the intellect, if it would master experience at all or understand anything, to frame the idea of such a reality. If we wish to defend the use of such an idea and prove to ourselves its necessity, all we need do is to point to that coherence and recurrence in external phenomena. That brave effort and flight of intelligence which in the beginning raised man to the conception of reality, enabling him to discount and interpret appearance, will, if we retain our trust in reason, raise us continually anew to that same idea, by a no less spontaneous and victorious movement of thought.
CHAPTER IV--ON SOME CRITICS OF THIS DISCOVERY
[Sidenote: Psychology as a solvent.]
The English psychologists who first disintegrated the idea of substance, and whose traces we have in general followed in the above account, did not study the question wholly for its own sake or in the spirit of a science that aims at nothing but a historical a.n.a.lysis of mind. They had a more or less malicious purpose behind their psychology. They thought that if they could once show how metaphysical ideas are made they would discredit those ideas and banish them for ever from the world. If they retained confidence in any notion--as Hobbes in body, Locke in matter and in G.o.d, Berkeley in spirits, and Kant, the inheritor of this malicious psychology, in the thing-in-itself and in heaven--it was merely by inadvertence or want of courage. The principle of their reasoning, where they chose to apply it, was always this, that ideas whose materials could all be accounted for in consciousness and referred to sense or to the operations of mind were thereby exhausted and deprived of further validity. Only the unaccountable, or rather the uncriticised, could be true. Consequently the advance of psychology meant, in this school, the retreat of reason; for as one notion after another was clarified and reduced to its elements it was _ipso facto_ deprived of its function.
So far were these philosophers from conceiving that validity and truth are ideal relations, accruing to ideas by virtue of dialectic and use, that while on the one hand they pointed out vital affinities and pragmatic sanctions in the mind"s economy they confessed on the other that the outcome of their philosophy was sceptical; for no idea could be found in the mind which was not a phenomenon there, and no inference could be drawn from these phenomena not based on some inherent "tendency to feign." The a.n.a.lysis which was in truth legitimising and purifying knowledge seemed to them absolutely to blast it, and the closer they came to the bed-rock of experience the more incapable they felt of building up anything upon it. Self-knowledge meant, they fancied, self-detection; the representative value of thought decreased as thought grew in scope and elaboration. It became impossible to be at once quite serious and quite intelligent; for to use reason was to indulge in subjective fiction, while conscientiously to abstain from using it was to sink back upon inarticulate and brutish instinct.
In Hume this sophistication was frankly avowed. Philosophy discredited itself; but a man of parts, who loved intellectual games even better than backgammon, might take a hand with the wits and historians of his day, until the clock struck twelve and the party was over. Even in Kant, though the mood was more cramped and earnest, the mystical sophistication was quite the same. Kant, too, imagined that the bottom had been knocked out of the world; that in comparison with some unutterable sort of truth empirical truth was falsehood, and that validity for all possible experience was weak validity, in comparison with validity of some other and unmentionable sort. Since s.p.a.ce and time could not repel the accusation of being the necessary forms of perception, s.p.a.ce and time were not to be much thought of; and when the sad truth was disclosed that causality and the categories were instruments by which the idea of nature had to be constructed, if such an idea was to exist at all, then nature and causality shrivelled up and were dishonoured together; so that, the soul"s occupation being gone, she must needs appeal to some mysterious oracle, some abstract and irrelevant omen within the breast, and muster up all the stern courage of an accepted despair to carry her through this world of mathematical illusion into some green and infantile paradise beyond.
[Sidenote: Misconceived role of intelligence.]
What idea, we may well ask ourselves, did these modern philosophers entertain regarding the pretensions of ancient and mediaeval metaphysics?
What understanding had they of the spirit in which the natural organs of reason had been exercised and developed in those schools? Frankly, very little; for they accepted from ancient philosophy and from common-sense the distinction between reality and appearance, but they forgot the function of that distinction and dislocated its meaning, which was nothing but to translate the chaos of perception into the regular play of stable natures and objects congenial to discursive thought and valid in the art of living. Philosophy had been the natural science of perception raised to the reflective plane, the objects maintaining themselves on this higher plane being styled realities, and those still floundering below it being called appearances or mere ideas. The function of envisaging reality, ever since Parmenides and Herac.l.i.tus, had been universally attributed to the intellect. When the moderns, therefore, proved anew that it was the mind that framed that idea, and that what we call reality, substance, nature, or G.o.d, can be reached only by an operation of reason, they made no very novel or damaging discovery.
Of course, it is possible to disregard the suggestions of reason in any particular case and it is quite possible to believe, for instance, that the hypothesis of an external material world is an erroneous one. But that this hypothesis is erroneous does not follow from the fact that it is a hypothesis. To discard it on that ground would be to discard all reasoned knowledge and to deny altogether the validity of thought. If intelligence is a.s.sumed to be an organ of cognition and a vehicle for truth, a given hypothesis about the causes of perception can only be discarded when a better hypothesis on the same subject has been supplied. To be better such a hypothesis would have to meet the multiplicity of phenomena and their mutations with a more intelligible scheme of comprehension and a more useful instrument of control.
[Sidenote: All criticism dogmatic.]
Scepticism is always possible while it is partial. It will remain the privilege and resource of a free mind that has elasticity enough to disintegrate its own formations and to approach its experience from a variety of sides and with more than a single method. But the method chosen must be coherent in itself and the point of view a.s.sumed must be adhered to during that survey; so that whatever reconstruction the novel view may produce in science will be science still, and will involve a.s.sumptions and dogmas which must challenge comparison with the dogmas and a.s.sumptions they would supplant. People speak of dogmatism as if it were a method to be altogether outgrown and something for which some non-a.s.sertive philosophy could furnish a subst.i.tute. But dogmatism is merely a matter of degree. Some thinkers and some systems retreat further than others into the stratum beneath current conventions and make us more conscious of the complex machinery which, working silently in the soul, makes possible all the rapid and facile operations of reason. The deeper this retrospective glance the less dogmatic the philosophy. A primordial const.i.tution or tendency, however, must always remain, having structure and involving a definite life; for if we thought to reach some wholly vacant and indeterminate point of origin, we should have reached something wholly impotent and indifferent, a blank pregnant with nothing that we wished to explain or that actual experience presented. When, starting with the inevitable preformation and const.i.tutional bias, we sought to build up a simpler and n.o.bler edifice of thought, to be a palace and fortress rather than a prison for experience, our critical philosophy would still be dogmatic, since it would be built upon inexplicable but actual data by a process of inference underived but inevitable.
[Sidenote: A choice of hypotheses.]
No doubt Aristotle and the scholastics were often uncritical. They were too intent on building up and b.u.t.tressing their system on the broad human or religious foundations which they had chosen for it. They nursed the comfortable conviction that whatever their thought contained was eternal and objective truth, a copy of the divine intellect or of the world"s intelligible structure. A sceptic may easily deride that confidence of theirs; their system may have been their system and nothing more. But the way to proceed if we wish to turn our shrewd suspicions and our sense of insecurity into an articulate conviction and to prove that they erred, is to build another system, a more modest one, perhaps, which will grow more spontaneously and inevitably in the mind out of the data of experience. Obviously the rival and critical theory will make the same tacit claim as the other to absolute validity. If all our ideas and perceptions conspire to reinforce the new hypothesis, this will become inevitable and necessary to us. We shall then condemn the other hypothesis, not indeed for having been a hypothesis, which is the common fate of all rational and interpretative thought, but for having been a hypothesis artificial, misleading, and false; one not following necessarily nor intelligibly out of the facts, nor leading to a satisfactory reaction upon them, either in contemplation or in practice.
[Sidenote: Critics disguised enthusiasts.]
Now this is in truth exactly the conviction which those malicious psychologists secretly harboured. Their critical scruples and transcendental qualms covered a robust rebellion against being fooled by authority. They rose to abate abuses among which, as Hobbes said, "the frequency of insignificant speech is one." Their psychology was not merely a cathartic, but a gospel. Their young criticism was sent into the world to make straight the path of a new positivism, as now, in its old age, it is invoked to keep open the door to superst.i.tion. Some of those reformers, like Hobbes and Locke, had at heart the interests of a physical and political mechanism, which they wished to subst.i.tute for the c.u.mbrous and irritating constraints of tradition. Their criticism stopped at the frontiers of their practical discontent; they did not care to ask how the belief in matter, s.p.a.ce, motion, G.o.d, or whatever else still retained their allegiance, could withstand the kind of psychology which, as they conceived, had done away with individual essences and nominal powers. Berkeley, whose interests lay in a different quarter, used the same critical method in support of a different dogmatism; armed with the traditional pietistic theory of Providence he undertook with a light heart to demolish the whole edifice which reason and science had built upon spatial perception. He wished the lay intellect to revert to a pious idiocy in the presence of Nature, lest consideration of her history and laws should breed "mathematical atheists"; and the outer world being thus reduced to a sensuous dream and to the blur of immediate feeling, intelligence and practical faith would be more unremittingly employed upon Christian mythology. Men would be bound to it by a necessary allegiance, there being no longer any rival object left for serious or intelligent consideration.