4. Nor is it enough to acquire a knowledge of all the sciences or even of rational philosophy in its various departments, unless we can reduce all things to higher and higher generalizations, or form one philosophy of all of them, sufficiently comprehensive to embrace all. The one philosophy to which we allude, and which we denominate the Mathematical Philosophy of Universals, although hitherto unknown to the world, is still of possible attainment; and it is our wish, if ease and tranquillity of mind be granted, ourselves to lay its foundations. Without its assistance, it is idle to hope to arrive at a knowledge of the soul; for it is the very philosophy, not of the mind, but of the soul (the mind is to be developed up to the soul, which latter admits of no development); in other words, it is the analysis whereby the soul comprehends its own objects. As however this philosophy, as we said before, is altogether unknown, and it will therefore perhaps be thought fruitless to endeavor to acquire it, so before we give a statement of its principles, we shall by no means venture dogmatically to declare its use; but shall be content with observing, that without its help, it will be easier to reach the moon than to explore the soul.
