Professor Clifford, in a lecture on "Body and Mind" which he delivered at St. George's Hall, and afterwards published in the Fortnightly Review, argues against the existence of God on the ground that, as Mind is always associated with Matter within experience, there arises a presumption against Mind existing anywhere without being thus associated, so that unless we can trace in the disposition of the heavenly bodies some resemblance to the conformation of cerebral structure, we are to conclude that there is a considerable balance of probability in favour of Atheism. Now, as this argument—if we rid it of the grotesque allusion to the heavenly bodies—is one that is frequently met with, it seems desirable in this place briefly to analyse it. First of all, then, the validity of the argument depends upon the probability there is that the constant associated of Mind with Matter within experience is due to a causal connection; for if the association in question is merely an association and nothing more, the origin of known mind is as far from being explained as it would be were Mind never known as associated with Matter. But, in the next place, supposing the constant association in question to be due to a causal connection, it by no means follows that because Mind is due to Matter within experience, therefore Mind cannot exist in any other mode beyond experience.
Doubtless, from analogy, there is a presumption against the hypothesis that the same entity should exist in more than one mode at the same time; but clearly in this case we are quite unable to estimate the value of this presumption. Consequently, even assuming a causal connection between Matter and Human Mind, if there is any, the slightest, indications supplied by any other facts of experience pointing to the existence of a Divine Mind, such indications should be allowed as much argumentative weight as they would have had in the absence of the presumption we are considering. Hence Professor Clifford's conclusion cannot be regarded as valid until all the other arguments in favour of Theism have been separately refuted. Doubtless Professor Clifford will be the first to recognise the cogency of this criticism—if indeed it has not already occurred to him; for as I know that he is much too clear a thinker not to perceive the validity of these considerations, I am willing to believe that the substance of them was omitted from his essay merely for the sake of brevity; but, for the sake of less thoughtful persons, I have deemed it desirable to state thus clearly that the problem of Theism cannot be solved on grounds of Materialism alone. [This note was written before I had the advantage of Professor Clifford's acquaintance, but now I leave it, as I leave all other parts of this essay—viz., as it was originally written.—1878.]
[8] To avoid burdening the text, I have omitted another criticism which may be made on Locke's argument. "Triangle" is a word by which we designate a certain figure, one of the properties of which is that the sum of its angles is equal to two right angles. In other words, any figure which does not exhibit this property is not that figure which we designate a triangle. Hence, when Locke says he cannot conceive of a triangle which does not present this property, it may be answered that his inability arises merely from the fact that any figure which fails to present this property is not a figure to which the term "triangle" can apply. Thus viewed, however, the illustration would obviously be absurd, for the same reason that the question of the clown is absurd, "Can you think of a horse that is just like a cow?" What Locke evidently means is, that we cannot conceive of any geometrical figure which presents all the other properties of a triangle without also presenting the property in question. Now, even admitting, with Locke, that it is as inconceivable that the entity known to us as Matter should possess the property of causing thought as it is that the figure which we term a triangle should posses the property of containing more than two right angles, still it remains, for the purposes of Locke's supposed theistic demonstration, to prove that it is an inconceivable for the entity which we call Mind not to be due to another Mind, as it is for a triangle not to contain, other than two right angles. But, further, even if it were possible to prove this, the demonstration would make as much against Theism as in favour of it; for if, as the illustration of the triangle implies, we restrict the meaning of the word "Mind" to an entity one of whose essential qualities is that it should be caused by another Mind, the words "Supreme and Uncaused Mind" involve a contradiction in terms, just as much as would the words "A square triangle having four right angles." It would, therefore, seem that if we adhere to Locke's argument, and pursue it to its conclusion, the only logical outcome would be this:—Seeing that by the word "Mind," I expressly connote the quality of derivation from a prior Mind, as a quality belonging no less essentially to Mind than the quality of presenting two right angles belongs to a triangle; therefore, whatever other attributes I ascribe to the First Cause, I must clearly exclude the attribute Mind; and hence, whatever else such a Cause may be, it follows from my argument that it certainly is—Not Mind.
[9] Hamilton.
[10] Lectures on Metaphysics, vol. i. pp. 25-31.
[11] Lectures on Metaphysics, vol. ii. p. 542.
[12] Loc. cit., p. 543.
[13] Appendix to Discussions, pp. 614, 165.
[14] Mill, in the lengthy chapter which he devotes to the freedom of the will in his Examination, does not notice this point.
[15] If more evidence can be wanted, it is supplied in some suggestive facts of Psychology. For example, "From our earliest childhood, the idea of doing wrong (that is, of doing what is forbidden, or what is injurious to others) and the idea of punishment are presented to the mind together, and the intense character of the impressions causes the association between them to attain the highest degree of closeness and intimacy. Is it strange, or unlike the usual processes of the human mind, that in these circumstances we should retain the feeling and forget the reason on which it is grounded? But why do I speak of forgetting? In most cases the reason has never, in our early education, been presented to the mind. The only ideas presented have been those of wrong and punishment, and an inseparable association has been created between these directly, without the help of any intervening idea. This is quite enough to make the spontaneous feelings of mankind regard punishment and a wrong-doer as naturally fitted to each other—as a conjunction appropriate in itself, independently of any consequences," &c.—Mill, Examination of Hamilton, p. 599.