Now why will not men of sense, and men who have any just pretensions to scholarship, see that there must of necessity be gross sophistry somewhere in any system of metaphysics, which pretends to give us an adequate and scientific self-knowledge--to render comprehensible to us the mysterious laws of our own inward being, with less manly and persevering effort of thought on our part, than is confessedly required to comprehend the simplest of those sciences, all of which are but some of the _phænomena_ from which the laws in question are to be inferred?--Why will they not see and acknowledge--what one would suppose a moment's reflection would teach them--that to attain true self-knowledge by reflection upon the objects of our inward consciousness--not merely to understand the motives of our conduct as conscientious Christians, but to know ourselves scientifically as philosophers--must, of necessity, be the most deep and difficult of all our attainments in knowledge? I trust that what I have already said will be sufficient to expose the absurdity of objections against metaphysics in general, and do something towards showing, that we are in actual and urgent need of a system somewhat deeper than those, the contradictions of which have not without reason made the name of philosophy a terror to the friends of truth and of religion. "False metaphysics can be effectually counteracted by true metaphysics alone; and if the reasoning be clear, solid, and pertinent, the truth deduced can never be the less valuable on account of the depth from which it may have been drawn." It is a fact, too, of great importance to be kept in mind, in relation to this subject, that in the study of ourselves--in attaining a knowledge of our own being,--there are truths of vast concernment, and lying at a great depth, which yet no man can draw for another. However the depth may have been fathomed, and the same truth brought up by others, for a light and a joy to their own minds, it must still remain, and be sought for by us, each for himself, at the bottom of the well.