Now, let me say first that I agree with Mr. Balfour that the doctrine thus imputed to the "naturalist" is absurd. I do not believe, for I cannot believe, that I am only a dance of atoms. I "cannot" believe, I say, for the words are to me meaningless. My sensations and emotions are to me the typical realities. I cannot doubt the real existence of pain and pleasure, grief and joy, whatever else I may doubt. I believe, for example, that my toothache is a reality; and nobody will ever persuade me that it is merely a set of molecular changes in my tooth. That it, in some way, is dependent upon such changes I fully believe; but that is quite a different statement. And, secondly, I agree with Mr. Balfour (or with what I take to be Mr. Balfour's belief) that the scientific doctrines which are reached by help of these atoms are established truths. I believe those doctrines, not because I am convinced by the arguments, which I may not have examined or be capable of examining; nor simply because I trust, though I do trust, in the ability and the candour of the scientific reasoners; but because the doctrines can be and have been independently verified. I believe, that is, in modern astronomy because it has enabled modern astronomers to predict eclipses, and enabled Adams and Leverrier to discover Neptune. That is the conclusive proof; for it is impossible to suppose that the power of prediction should be a result of erroneous belief, and such proofs are verifiable by anybody who can observe the phenomena.