Of course this idea led, and would necessarily lead, to follies and fancies enough, as long as the phenomena of nature were not carefully studied, and her laws scientifically investigated; and all the dreams of Paracelsus or Van Helmont, Cardan or Crollius, Baptista Porta or Behmen, are but the natural and pardonable errors of minds which, while they felt deeply the sanctity and mystery of Nature, had no Baconian philosophy to tell them what Nature actually was, and what she actually said. But their idea lives still, and will live as long as the belief in a one God lives. The physical and spiritual worlds cannot be separated by an impassable gulf. They must, in some way or other, reflect each other, even in their minutest phenomena, for so only can they both reflect that absolute primeval unity, in whom they both live and move and have their being. Mr. Vaughan's object, however, has not been to work out in his book such problems as these. Had he done so, he would have made his readers understand better what Mysticism is; he would have avoided several hasty epithets, by the use of which he has, we think, deceived himself into the notion that he has settled a matter by calling it a hard name; he would have explained, perhaps, to himself and to us, many strange and seemingly contradictory facts in the annals of Mysticism. But he would also not have written so readable a book. On the whole he has taken the right course, though one wishes that he had carried it out more methodically. A few friends, literate and comfortable men, and right-hearted Christians withal, meet together to talk over these same mystics, and to read papers and extracts which will give a general notion of the subject from the earliest historic times. The gentlemen talk about and about a little too much; they are a little too fond of illustrations of the popular pulpit style; they are often apt to say each his say, with very little care of what the previous speaker has uttered; in fact these conversations are, as conversations, not good, but as centres of thought they are excellent. There is not a page nor a paragraph in which there is not something well worth recollecting, and often reflections very wise and weighty indeed, which show that whether or not Mr. Vaughan has thoroughly grasped the subject of Mysticism, he has grasped and made part of his own mind and heart many things far more practically important than Mysticism, or any other form of thought; and no one ought to rise up from the perusal of his book without finding himself if not a better, at least a more thoughtful man, and perhaps a humble one also, as he learns how many more struggles and doubts, discoveries, sorrows and joys, the human race has passed through, than are contained in his own private experience.