I have spoken with a plainness which will probably give offence of the debased supernaturalism which usurps the name of Mysticism in Roman Catholic countries. I desire to insult no man's convictions; and it is for this reason that I have decided not to print my analysis of Ribet's work (_La Mystique Divine, distinguée des Contrefaçons diaboliques_. Nouvelle Edition, Paris, 1895, 3 vols.), which I intended to form an Appendix. It would have opened the eyes of some of my readers to the irreconcilable antagonism between the Roman Church and science; but though I translated and summarised my author faithfully, the result had all the appearance of a malicious travesty. I have therefore suppressed this Appendix; but with regard to Roman Catholic "Mysticism" there is no use in mincing matters. Those who find edification in signs and wonders of this kind, and think that such "supernatural phenomena," even if they were well authenticated instead of being ridiculous fables, could possibly establish spiritual truths, will find little or nothing to please or interest them in these pages. But those who reverence Nature and Reason, and have no wish to hear of either of them being "overruled" or "suspended," will, I hope, agree with me in valuing highly the later developments of mystical thought in Northern Europe. There is another class of "mystics" with whom I have but little sympathy--the dabblers in occultism. "Psychical research" is, no doubt, a perfectly legitimate science; but when its professors invite us to watch the breaking down of the middle wall of partition between matter and spirit, they have, in my opinion, ceased to be scientific, and are in reality hankering after the beggarly elements of the later Neoplatonism. The charge of "pantheistic tendency" will not, I hope, be brought against me without due consideration. I have tried to show how the Johannine Logos-doctrine, which is the basis of Christian Mysticism, differs from Asiatic Pantheism, from Acosmism, and from (one kind of) evolutionary Idealism. Of course, speculative Mysticism is nearer to Pantheism than to Deism; but I think it is possible heartily to eschew Deism without falling into the opposite error.