And from this the practical deduction is—tolerance. Let no man think that he has any argumentative right to expect that the mere subjective habit or tone of his own mind should exert any influence on that of his fellow; but rather let him always remember that the only legitimate weapons of his intellectual warfare are those the material of which is derived from the external world, and only the form of which is due to the forging process of his own mind. And if in battle such weapons seem to be unduly blunted on the hardened armoury of traditional beliefs, or on the no less hardened armoury of confirmed scepticism, let him remember further that he must not too confidently infer that the fault does not lie in the character of his own weapons. To drop the figure, let none of us forget in how much need we all stand of this caution:—Knowing how greatly the value of arguments is affected, even to the most impartial among us, by the frame of mind in which we regard them, let all of us be jealously careful not to over-estimate the certainty that our frame or habit of mind is actually superior to that of our neighbour. And, in conclusion, it is surely needless to insist on the yet greater need there is for most of us to bear in mind this further caution:—Knowing with what great subjective opposition arguments are met when they conflict with our established modes of thought, let us all be jealously careful to guard the sanctuary of our judgment from the polluting tyranny of habit.
[CHAPTER VII].
GENERAL SUMMARY AND CONCLUSIONS.
[§ 48]. Our analysis is now at an end, and a very few words will here suffice to convey an epitomised recollection of the numerous facts and conclusions which we have found it necessary to contemplate. We first disposed of the conspicuously absurd supposition that the origin of things, or the mystery of existence, admits of being explained by the theory of Theism in any further degree than by the theory of Atheism. Next it was shown that the argument "Our heart requires a God" is invalid, seeing that such a subjective necessity, even if made out, could not be sufficient to prove—or even to render probable—an objective existence. And with regard to the further argument that the fact of our theistic aspirations point to God as to their explanatory cause, it became necessary to observe that the argument could only be admissible after the possibility of the operation of natural causes had been excluded. Similarly the argument from the supposed intuitive necessity of individual thought was found to be untenable, first, because, even if the supposed necessity were a real one, it would only possess an individual applicability; and second, that, as a matter of fact, it is extremely improbable that the supposed necessity is a real necessity even for the individual who asserts it, while it is absolutely certain that it is not such to the vast majority of the race. The argument from the general consent of mankind, being so obviously fallacious both as to facts and principles, was passed over without comment; while the argument from a first cause was found to involve a logical suicide. Lastly, the argument that, as human volition is a cause in nature, therefore all causation is probably volitional in character, was shown to consist in a stretch of inference so outrageous that the argument had to be pronounced worthless.
Proceeding next to examine the less superficial arguments in favour of Theism, it was first shown that the syllogism, All known minds are caused by an unknown mind; our mind is a known mind; therefore our mind is caused by an unknown mind,—is a syllogism that is inadmissible for two reasons. In the first place, "it does not account for mind (in the abstract) to refer it to a prior mind for its origin;" and therefore, although the hypothesis, if admitted, would be an explanation of known mind, it is useless as an argument for the existence of the unknown mind, the assumption of which forms the basis of that explanation. Again, in the next place, if it be said that mind is so far an entity sui generis that it must be either self-existing or caused by another mind, there is no assignable warrant for the assertion. And this is the second objection to the above syllogism; for anything within the whole range of the possible may, for aught that we can tell, be competent to produce a self-conscious intelligence. Thus an objector to the above syllogism need not hold any theory of things at all; but even as opposed to the definite theory of materialism, the above syllogism has not so valid an argumentative basis to stand upon. We know that what we call matter and force are to all appearance eternal, while we have no corresponding evidence of a "mind that is even apparently eternal." Further, within experience mind is invariably associated with highly differentiated collocations of matter and distributions of force, and many facts go to prove, and none to negative, the conclusion that the grade of intelligence invariably depends upon, or at least is associated with, a corresponding grade of cerebral development. There is thus both a qualitative and a quantitative relation between intelligence and cerebral organisation. And if it is said that matter and motion cannot produce consciousness because it is inconceivable that they should, we have seen at some length that this is no conclusive consideration as applied to a subject of a confessedly transcendental nature, and that in the present case it is particularly inconclusive, because, as it is speculatively certain that the substance of mind must be unknowable, it seems à priori probable that, whatever is the cause of the unknowable reality, this cause should be more difficult to render into thought in that relation than would some other hypothetical substance which is imagined as more akin to mind. And if it is said that the more conceivable cause is the more probable cause, we have seen that it is in this case impossible to estimate the validity of the remark. Lastly, the statement that the cause must contain actually all that its effects can contain, was seen to be inadmissible in logic and contradicted by everyday experience; while the argument from the supposed freedom of the will and the existence of the moral sense was negatived both deductively by the theory of evolution, and inductively by the doctrine of utilitarianism. On the whole, then, with regard to the argument from the existence of the human mind, we were compelled to decide that it is destitute of any assignable weight, there being nothing more to lead to the conclusion that our mind has been caused by another mind, than to the conclusion that it has been caused by anything else whatsoever.
With regard to the argument from Design, it was observed that Mill's presentation of it is merely a resuscitation of the argument as presented by Paley, Bell, and Chalmers. And indeed we saw that the first-named writer treated this whole subject with a feebleness and inaccuracy very surprising in him; for while he has failed to assign anything like due weight to the inductive evidence of organic evolution, he did not hesitate to rush into a supernatural explanation of biological phenomena. Moreover, he has failed signally in his analysis of the Design argument, seeing that, in common with all previous writers, he failed to observe that it is utterly impossible for us to know the relations in which the supposed Designer stands to the Designed,—much less to argue from the fact that the Supreme Mind, even supposing it to exist, caused the observable products by any particular intellectual process. In other words, all advocates of the Design argument have failed to perceive that, even if we grant nature to be due to a creating Mind, still we have no shadow of a right to conclude that this Mind can only have exerted its creative power by means of such and such cogitative operations. How absurd, therefore, must it be to raise the supposed evidence of such cogitative operations into evidences of the existence of a creating Mind! If a theist retorts that it is, after all, of very little importance whether or not we are able to divine the methods of creation, so long as the facts are there to attest that, in some way or other, the observable phenomena of nature must be due to Intelligence of some kind as their ultimate cause, then I am the first to endorse this remark. It has always appeared to me one of the most unaccountable things in the history of speculation that so many competent writers can have insisted upon Design as an argument for Theism, when they must all have known perfectly well that they have no means of ascertaining the subjective psychology of that Supreme Mind whose existence the argument is adduced to demonstrate. The truth is, that the argument from teleology must, and can only, rest upon the observable facts of nature, without reference to the intellectual processes by which these facts may be supposed to have been accomplished. But, looking to the "present state of our knowledge," this is merely to change the teleological argument from its gross Paleyerian form, into the argument from the ubiquitous operation of general laws. And we saw that this transformation is now a rational necessity. How far the great principle of natural selection may have been instrumental in the evolution of organic forms, is not here, as Mill erroneously imagined, the question; the question is simply as to whether we are to accept the theory of special creation or the theory of organic evolution. And forasmuch as no competent judge at the present time can hesitate for one moment in answering this question, the argument from a proximate teleology must be regarded as no longer having any rational existence.
How then does it fare with the last of the arguments—the argument from an ultimate teleology? Doubtless at first sight this argument seems a very powerful one, inasmuch as it is a generic argument, which embraces not only biological phenomena, but all the phenomena of the universe. But nevertheless we are constrained to acknowledge that its apparent power dwindles to nothing in view of the indisputable fact that, if force and matter have been eternal, all and every natural law must have resulted by way of necessary consequence. It will be remembered that I dwelt at considerable length and with much earnestness upon this truth, not only because of its enormous importance in its bearing upon our subject, but also because no one has hitherto considered it in that relation.
The next step, however, was to mitigate the severity of the conclusion that was liable to be formed upon the utter and hopeless collapse of all the possible arguments in favour of Theism. Having fully demonstrated that there is no shadow of a positive argument in support of the theistic theory, there arose the danger that some persons might erroneously conclude that for this reason the theistic theory must be untrue. It therefore became necessary to point out, that although, as far as we can see, nature does not require an Intelligent Cause to account for any of her phenomena, yet it is possible that, if we could see farther, we should see that nature could not be what she is unless she had owed her existence to an Intelligent Cause. Or, in other words, the probability there is that an Intelligent Cause is unnecessary to explain any of the phenomena of nature, is only equal to the probability there is that the doctrine of the persistence of force is everywhere and eternally true.
As a final step in our analysis, therefore, we altogether quitted the region of experience, and ignoring even the very foundations of science, and so all the most certain of relative truths, we carried the discussion into the transcendental region of purely formal considerations. And here we laid down the canon, "that the value of any probability, in its last analysis, is determined by the number, the importance, and the definiteness of the relations known, as compared with those of the relations unknown;" and, consequently, that in cases where the unknown relations are more numerous, more important, or more indefinite than are the known relations, the value of our inference varies inversely as the difference in these respects between the relations compared. From which canon it followed, that as the problem of Theism is the most ultimate of all problems, and so contains in its unknown relations all that is to man unknown and unknowable, these relations must be pronounced the most indefinite of all relations that it is possible for man to contemplate; and, consequently, that although we have here the entire range of experience from which to argue, we are unable to estimate the real value of any argument whatsoever. The unknown relations in our attempted induction being wholly indefinite, both in respect of their number and importance, as compared with the known relations, it is impossible for us to determine any definite probability either for or against the being of a God. Therefore, although it is true that, so far as human science can penetrate or human thought infer, we can perceive no evidence of God, yet we have no right on this account to conclude that there is no God. The probability, therefore, that nature is devoid of Deity, while it is of the strongest kind if regarded scientifically—amounting, in fact, to a scientific demonstration,—is nevertheless wholly worthless if regarded logically. Notwithstanding it is as true as is the fundamental basis of all science and of all experience that, if there is a God, his existence, considered as a cause of the universe, is superfluous, it may nevertheless be true that, if there had never been a God, the universe could never have existed.