most illustrious Newtonians have declared no otherwise comprehensible than as an immediate spiritual influence, there remains nothing but its law, the execution of which on a vast scale is the mechanism of the heavenly motions. The theory of natural philosophy would then be completed, when all nature was demonstrated to be identical in essence with that, which in its highest known power exists in man as intelligence and self-consciousness; when the heavens and the earth shall declare not only the power of their maker, but the glory and the presence of their God, even as he appeared to the great prophet during the vision of the mount in the skirts of his divinity. This may suffice to show, that even natural science, which commences with the material phaenomenon as the reality and substance of things existing, does yet by the necessity of theorizing unconsciously, and as it were instinctively, end in nature as an intelligence; and by this tendency the science of nature becomes finally natural philosophy, the one of the two poles of fundamental science. 2. OR THE SUBJECTIVE IS TAKEN AS THE FIRST, AND THE PROBLEM THEN IS, HOW THERE SUPERVENES TO IT A COINCIDENT OBJECTIVE. In the pursuit of these sciences, our success in each, depends on an austere and faithful adherence to its own principles, with a careful separation and exclusion of those, which appertain to the opposite science. As the natural philosopher, who directs his views to the objective, avoids above all things the intermixture of the subjective in his knowledge, as for instance, arbitrary suppositions or rather suflictions, occult qualities, spiritual agents, and the substitution of final for efficient causes; so on the other hand, the transcendental or intelligential philosopher is equally anxious to preclude all interpellation of the objective into the subjective principles of his science, as for instance the assumption of impresses or configurations in the brain, correspondent to miniature pictures on the retina painted by rays of light from supposed originals, which are not the immediate and real objects of vision, but deductions from it for the purposes of explanation. This purification of the mind is effected by an absolute and scientific scepticism, to which the mind voluntarily determines itself for the specific purpose of future certainty. Des Cartes who (in his meditations) himself first, at least of the moderns, gave a beautiful example of this voluntary doubt, this self-determined indetermination, happily expresses its utter difference from the scepticism of vanity or irreligion: Nec tamen in Scepticos imitabar, qui dubitant tantum ut dubitent, et praeter incertitudinem ipsam nihil quaerunt. Nam contra totus in eo eram ut aliquid certi reperirem [51]. Nor is it less distinct in its motives and final aim, than in its proper objects, which are not as in ordinary scepticism the prejudices of education and circumstance, but those original and innate prejudices