The feeling of gratitude, which I cherish toward these men, has caused me to digress further than I had foreseen or proposed; but to have passed them over in an historical sketch of my literary life and opinions, would have seemed to me like the denial of a debt, the concealment of a boon. For the writings of these Mystics acted in no slight degree to prevent my mind from being imprisoned within the outline of any single dogmatic system. They contributed to keep alive the heart in the head; gave me an indistinct, yet stirring and working presentiment, that all the products of the mere reflective faculty partook of death, and were as the rattling twigs and sprays in winter, into which a sap was yet to be propelled from some root to which I had not penetrated, if they were to afford my soul either food or shelter. If they were too often a moving cloud of smoke to me by day, yet they were always a pillar of fire throughout the night, during my wanderings through the wilderness of doubt, and enabled me to skirt, without crossing, the sandy deserts of utter unbelief. That the system is capable of being converted into an irreligious Pantheism, I well know. The Ethics of Spinoza, may, or may not, be an instance. But at no time could I believe, that in itself and essentially it is incompatible with religion, natural or revealed: and now I am most thoroughly persuaded of the contrary. The writings of the illustrious sage of Koenigsberg, the founder of the Critical Philosophy, more than any other work, at once invigorated and disciplined my understanding. The originality, the depth, and the compression of the thoughts; the novelty and subtlety, yet solidity and importance of the distinctions; the adamantine chain of the logic; and I will venture to add--(paradox as it will appear to those who have taken their notion of Immanuel Kant from Reviewers and Frenchmen)--the clearness and evidence, of the Critique of the Pure Reason; and Critique of the Judgment; of the Metaphysical Elements of Natural Philosophy; and of his Religion within the bounds of Pure Reason, took possession of me as with the giant’s hand. After fifteen years’ familiarity with them, I still read these and all his other productions with undiminished delight and increasing admiration. The few passages that remained obscure to me, after due efforts of thought, (as the chapter on original apperception,) and the apparent contradictions which occur, I soon found were hints and insinuations referring to ideas, which KANT either did not think it prudent to avow, or which he considered as consistently left behind in a pure analysis, not of human nature in toto, but of the speculative intellect alone. Here therefore he was constrained to commence at the point of reflection, or natural consciousness: while in his moral system he was permitted to assume a higher ground (the autonomy of the will) as a postulate deducible from the unconditional command, or (in the technical language of his school)