The Cambridge History of English and American Literature in 18 Volumes (1907–21).
Volume VIII. The Age of Dryden.
§ 11. Mores Immortality of the Soul, Grand Mystery of Godliness and Mystery of Iniquity
In the meantime, Henry More was acquiring a brilliant reputation by his untiring literary activity, and, in 1652, brought out his Antidote against Atheism. In the following year appeared his Conjectura Cabbalistica, and, in 1656, his Enthusiasmus Triumphatus, a skilful exposure of the pretensions of the “enthusiasm” which was then at its apogee. In 1659, he re-wrote, in an expanded and connected form, the dissertations prefixed to the several books of his Song of the Soul, and, along with the argument of The Song itself, reduced to plainer prose, published his treatise entitled The Immortality of the Soul. In 1660 appeared his Grand Mystery of Godliness, which Beaumont was imprudent enough to take upon himself to criticise. The prosaic poet was incapable of appreciating the poetic philosopher, and blundered sadly. The underlying design of More’s treatise would appear, indeed, to have been unintelligble to him, and his attack recoiled disastrously on himself. In 1662, More published a collected edition of his prose works up to that date, including his correspondence with Descartes. It is in the preface to this volume that More appears at his best, still adhering to his original standpoint, when he asks, “what greater satisfaction can there be to a rational spirit than to find himself able to appeal to the strictest rules of reason and philosophy?”
After the collapse of the Savoy conference, however, his avowed sentiments and whole tone (in common with those of not a few other writers) underwent a radical change. Worthington suggested to him to throw over Cartesianism, and he did so—his Enchiridion Metaphysicum, which appeared in 1668, being especially designed as an exposition of a science of spiritualism, in opposition to the Cartesian doctrines.