In the first place, it is not—cannot—be denied, even by a theist, that the deductions from physical science do embrace the fact of cosmic harmony in their explanation, seeing that, as they explain the operation of general laws collectively, they must be regarded as also explaining every effect of such operation. And this, as we have seen, is a consideration to which our imaginary theist was not blind. How then did he meet it? He met it by the considerations—1st. That the scientific train of reasoning evolved this conclusion only by employing, in a wholly unrestricted manner, "symbolic conceptions of the illegitimate order;" and, 2d. That when the conclusion thus illegitimately evolved was directly confronted with the fact of cosmic harmony which it professes to explain, he found it to be beyond the powers of human thought to conceive of such an effect as due to such a cause. Now, as already observed, I consider these strictures on the scientific train of reasoning to be thoroughly valid. There can be no question that the highly symbolic character of the conceptions which that train of reasoning is compelled to adopt, is a source of serious weakness to the conclusions which it ultimately evolves; while there can, I think, be equally little doubt that there does not live a human being who would venture honestly to affirm, that he can really conceive the fact of cosmic harmony as exclusively due to the causes which the scientific train of reasoning assigns. But freely conceding this much, and an atheist may reply, that although the objections of his antagonist against this symbolic method of reasoning are undoubtedly valid, yet, from the nature of the case, this is the only method of scientific reasoning which is available. If, therefore, he expresses his obligations to his antagonist for pointing out a source of weakness in this method of reasoning—a source of weakness, be it observed, which renders it impossible for him to estimate the actual, as distinguished from the apparent, probability of the conclusion attained—this is all that he can be expected to do: he cannot be expected to abandon the only scientific method of reasoning available, in favour of a metaphysical method which only escapes the charge of symbolism by leaping with a single bound from a known cause (human intelligence) to the inference of an unknowable cause (Divine Intelligence). For the atheist may well point out that, however objectionable his scientific method of reasoning may be on account of the symbolism which it involves, it must at any rate be preferable to the metaphysical method, in that its symbols throughout refer to known causes.[[27]] With regard, then, to this stricture on the scientific method of reasoning, I conclude that although the caveat which it contains should never be lost sight of by atheists, it is not of sufficient cogency to justify theists in abandoning a scientific in favour of a metaphysical mode of reasoning.
How then does it fare with the other stricture, or the consideration that, "when the conclusion thus illegitimately[[28]] evolved is confronted with the fact of cosmic harmony which it professes to explain, we find it to be beyond the powers of human thought to conceive of such an effect as due to such a cause"? The atheist may answer, in the first place, that a great deal here turns on the precise meaning which we assign to the word "conceive." For we have just seen that, by employing "symbolic conceptions," we are able to frame what we may term a formal conception of universal harmony as due to the persistence of force and the primary qualities of matter. That is to say, we have seen that such universal harmony as nature presents must be regarded as an effect of the collective operation of general laws; and we have previously arrived at a formal conception of general laws as singly and collectively the product of self-evolution. Consequently, the word "conceive," as used in the theistic argument, must be taken to mean our ability to frame what we may term a material conception, or a representation in thought of the whole history of cosmic evolution, which representation shall be in some satisfactory degree intellectually realisable. Observing, then, this important difference between an inconceivability which arises from an impossibility of establishing relations in thought between certain abstract or symbolic conceptions, and an inconceivability which arises from a mere failure to realise in imagination the results which must follow among external relations if the symbolically conceivable combinations among them ever took place, an atheist may here argue as follows; and it does not appear that there is any legitimate escape from his reasonings.
'I first consider the undoubted fact that the existence of a Supreme Mind in nature is, scientifically considered, unnecessary; and, therefore, that the only reason we require to entertain the supposition of any such existence at all is, that the complexity of nature being so great, we are unable adequately to conceive of its self-evolution—notwithstanding our reason tells us plainly that, given a self-existing universe of force and matter, and such self-evolution becomes abstractedly possible. I then reflect that this is a negative and not a positive ground of belief. If the hypothesis of self-evolution is true, we should à priori expect that by the time evolution had advanced sufficiently far to admit of the production of a reasoning intelligence, the complexity of nature must be so great that the nascent reasoning powers would be completely baffled in their attempts to comprehend the various processes going on around them. This seems to be about the state of things which we now experience. Still, as reason advances more and more, we may expect, both from general à priori principles and from particular historical analogies, that more and more of the processes of nature will admit of being interpreted by reason, and that in proportion as our ability to understand the frame and the constitution of things progresses, so our ability to conceive of them as all naturally and necessarily evolved will likewise and concurrently progress. Thus, for example, how vast a number of the most intricate and delicate correlations in nature have been rendered at once intelligible and conceivably due to non-intelligent causes, by the discovery of a single principle in nature—the principle of natural selection.
'In the adverse argument, conceivability is again made the unconditional test of truth, just as it was in the argument against the possibility of matter thinking. We reject the hypothesis of self-evolution, not because it is the more remote one, but simply because we experience a subjective incapacity adequately to frame the requisite generalisations in thought, or to frame them with as much clearness as we could wish. Yet our reason tells us as plainly as it tells us any general truth which is too large to be presented in detail, that there is nothing in the nature of things themselves, as far as we can see, antagonistic to the supposition of their having been self-evolved. Only on the ground, therefore, of our own intellectual deficiencies; only because as yet, by the self-evolutionary hypothesis, the inner order does not completely answer to the outer order; only because the number and complexity of subjective relations have not yet been able to rival those of the objective relations producing them; only on this ground do we refuse to assent to the obvious deductions of our reason.[[29]]
'And here I may observe, further, that the presumption in favour of atheism which these deductions establish is considerably fortified by certain à posteriori considerations which we cannot afford to overlook. In particular, I reflect that, as a matter of fact, the theistic theory is born of highly suspicious parentage,—that Fetichism, or the crudest form of the theory of personal agency in external nature, admits of being easily traced to the laws of a primitive psychology; that the step from this to Polytheism is easy; and that the step from this to Monotheism is necessary. If it is objected to this view that it does not follow that because some theories of personal agency have proved themselves false, therefore all such theories must be so—I answer, Unquestionably not; but the above considerations are not adduced in order to negative the theistic theory: they are merely adduced to show that the human mind has hitherto undoubtedly exhibited an undue and a vicious tendency to interpret the objective processes of nature in terms of its own subjective processes; and as we can see quite well that the current theory of personal agency in nature, whether or not true, is a necessary outcome of intellectual evolution, I think that the fact of so abundant an historical analogy ought to be allowed to lend a certain degree of antecedent suspicion to this theory—although, of course, the suspicion is of a kind which would admit of immediate destruction before any satisfactory positive evidence in favour of the theory.[[30]]
'But what is 'the satisfactory positive evidence' that is offered me? Nothing, save an alleged subjective incapacity on the part of my opponent adequately to conceive of the fact of cosmic harmony as due to physical causation alone. Now I have already commented on the weakness of his position; but as my opponent will doubtless resort to the consideration that inconceivability of an opposite is, after all, the best criterion of truth which at any given stage of intellectual evolution is available, I will now conclude my overthrow by pointing out that, even if we take the argument from teleology in its widest possible sense—the argument, I mean, from the general order and beauty of nature, as well as the gross constituent part of it from design—even taking this argument in its widest sense and upon its own ground (which ground, I presume, it is now sufficiently obvious can only be that of the inconceivability of its negation), I will conclude my examination of this argument by showing that it is quite as inconceivable to predicate cosmic harmony an effect of Intelligence, as it is to predicate it an effect of Non-intelligence; and therefore that the argument from inconceivability admits of being turned with quite as terrible a force upon Theism as it can be made to exert upon Atheism.
'"In metaphysical controversy, many of the propositions propounded and accepted as quite believable are absolutely inconceivable. There is a perpetual confusing of actual ideas with what are nothing but pseud-ideas. No distinction is made between propositions that contain real thoughts and propositions that are only the forms of thoughts. A thinkable proposition is one of which the two terms can be brought together in consciousness under the relation said to exist between them. But very often, when the subject of a proposition has been thought of as something known, and when the predicate of a proposition has been thought of as something known, and when the relation alleged between them has been thought of as a known relation, it is supposed that the proposition itself has been thought. The thinking separately of the elements of a proposition is mistaken for the thinking of them in the combination which the proposition affirms. And hence it continually happens that propositions which cannot be rendered into thought at all are supposed to be not only thought but believed. The proposition that Evolution is caused by Mind is one of this nature. The two terms are separately intelligible; but they can be regarded in the relation of effect and cause only so long as no attempt is made to put them together in this relation.
'"The only thing which any one knows as Mind is the series of his own states of consciousness; and if he thinks of any mind other than his own, he can think of it only in terms derived from his own. If I am asked to frame a notion of Mind divested of all those structural traits under which alone I am conscious of mind in myself, I cannot do it. I know nothing of thought save as carried on in ideas originally traceable to the effects wrought by objects on me. A mental act is an unintelligible phrase if I am not to regard it as an act in which states of consciousness are severally known as like other states in the series that has gone by, and in which the relations between them are severally known as like past relations in the series. If, then, I have to conceive evolution as caused by an 'originating Mind,' I must conceive this Mind as having attributes akin to those of the only mind I know, and without which I cannot conceive mind at all.
'"I will not dwell on the many incongruities hence resulting, by asking how the 'originating Mind' is to be thought of as having states produced by things objective to it, as discriminating among these states, and classing them as like and unlike; and as preferring one objective result to another. I will simply ask, What happens if we ascribe to the 'originating Mind' the character absolutely essential to the conception of mind, that it consists of a series of states of consciousness? Put a series of states of consciousness as cause and the evolving universe as effect, and then endeavour to see the last as flowing from the first. I find it possible to imagine in some dim way a series of states of consciousness serving as antecedent to any one of the movements I see going on; for my own states of consciousness are often indirectly the antecedents to such movements. But how if I attempt to think of such a series as antecedent to all actions throughout the universe—to the motions of the multitudinous stars throughout space, to the revolutions of all their planets round them, to the gyrations of all these planets on their axes, to the infinitely multiplied physical processes going on in each of these suns and planets? I cannot think of a single series of states of consciousness as causing even the relatively small groups of actions going on over the earth's surface. I cannot think of it even as antecedent to all the various winds and the dissolving clouds they bear, to the currents of all the rivers, and the grinding actions of all the glaciers; still less can I think of it as antecedent to the infinity of processes simultaneously going on in all the plants that cover the globe, from scattered polar lichens to crowded tropical palms, and in all the millions of quadrupeds that roam among them, and the millions of millions of insects that buzz about them. Even a single small set of these multitudinous terrestrial changes I cannot conceive as antecedent a single series of states of consciousness—cannot, for instance, think of it as causing the hundred thousand breakers that are at this instant curling over on the shores of England. How, then, is it possible for me to conceive an 'originating Mind,' which I must represent to myself as a single series of states of consciousness, working the infinitely multiplied sets of changes simultaneously going on in worlds too numerous to count, dispersed throughout a space that baffles imagination?
'"If, to account for this infinitude of physical changes everywhere going on, 'Mind must be conceived as there' 'under the guise of simple Dynamics,' then the reply is, that, to be so conceived, Mind must be divested of all attributes by which it is distinguished; and that, when thus divested of its distinguishing attributes, the conception disappears—the word Mind stands for a blank....