The only remaining argument advanced against inquiring into the assumed sciences, of which we are speaking, is this, that _The establishment of the truth of Mesmerism_, _and specially of Phrenology_, _would be destructive to the Christian Religion_, _and would subvert the authority of the Scriptures upon which that Religion is based_. To my mind, this is, by far, the gravest argument with which we have to deal, and I should be sorry indeed to treat it in an improper or unbecoming manner; yet, I feel that I should be failing in the duty I have imposed upon myself, were I not to look the presumed difficulty fairly in the face; and at least endeavour to justify my own conduct in regard to it; and if possible, to remove the delusion which, I humbly suggest, hangs upon the mind of those who make this objection. I am quite aware that it is impossible that I should do complete justice to this part of my subject; or, offer more than a comparatively very small part of the argument which might be adduced. My purpose, in this publication, would not be served by a long treatise; and I shall therefore endeavour to compress the argument as much as possible, begging the reader to judge impartially of what I do advance; and not to condemn the argument because I have been unable to compress that which would require a volume, into the pages of a small pamphlet. Before I proceed farther, I would altogether dismiss the objection, _That we cannot comprehend the phenomena_, observing, merely, that that remark applies, with equal force, to a vast variety of subjects and objects, which we are compelled to believe. “Go ask your mother Earth why Oaks are made Taller or stouter than the Weeds they shade.” To the serious, christian man, upon whom this objection has any influence, I would remark, that he who is disposed to admit the truth of that only which he can comprehend, confines his faith in a very narrow circle, within the circumference of which there can be no God! I here feel it incumbent upon me to state, that I have no sympathy with those individuals who would foster and encourage any Theory by which they hope to damage Christianity; and I wonder that any person can be found so hardy as to endeavour, covertly, to undermine the rock upon which the hopes of so many have been founded; to put out the light which has, for ages, served to guide the pious, humble christian in his journey through life; to take away and to destroy that feeling, with regard to a future world of happiness, which has been the Hope of the pious in all ages, which Hope they have cherished in their hearts, in every difficulty and in every distress, and which has been to them, on the stormy ocean of the World, as an “anchor to the soul.”